Chapter 1: Your Sleep and You

Chapter Introduction

Hi. I am the Cat.

I teach about sleep. Sleep is one of the most important things you do every day, even though you do it with your eyes closed. About one-third of your whole life is sleep. You sleep tonight. You slept last night. You will sleep tomorrow. The Cat is glad you are here to learn what sleep is.

This is the first time you and I are talking about sleep together. I am calm and slow, the way a cat is calm and slow. We will take our time. There is a lot to learn, and learning works best when we are not in a hurry.

In this chapter, you will learn three big ideas.

The first big idea is what sleep really is. When you sleep, your body rests, but your brain is still busy — just in different ways than when you are awake. Sleep is not "off." Sleep is its own kind of work.

The second big idea is how sleep helps you. While you sleep, your body grows and repairs. Your brain saves what you learned that day. Your feelings get a chance to settle. The Bear, the Turtle, and I all agree on this. Sleep, food, and a busy brain work together.

The third big idea is the most important one. Sometimes sleep is hard. Sometimes you have a bad dream. Sometimes you worry at bedtime. Sometimes your body just will not settle. All of that happens to everyone. When sleep gets hard for many nights in a row, or when your feelings get big at bedtime, you talk to a trusted grown-up. You are never alone with sleep worries. Not now, not ever.

Are you ready? Take a slow breath. Begin. Quietly.

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Lesson 1.1: What Sleep Is

Learning Objectives

By the end of this lesson, you will be able to:

• Tell what is happening in your body when you sleep
• Notice that your brain is still working during sleep, just in different ways
• Explain what dreams are at a simple level
• Name about how many hours of sleep kids your age need each night
• Notice that every animal sleeps in some way

Key Terms

The Cat Begins

The Cat sleeps a lot. Most grown cats sleep about 12 to 16 hours a day. Some sleep even more. A cat curls up in a sunny spot, closes its eyes, and is gone — but you can wake a cat with a small sound, and the cat opens its eyes right away. The cat was not gone. The cat was sleeping.

You sleep too. You are not a cat, and you do not sleep all day. But you sleep every single night. The Cat thinks sleep is one of the most interesting things a person does, and most kids your age have not yet been taught what sleep really is.

That is what this chapter is for.

Sleep Is Not "Off"

Some kids think that when you fall asleep, your brain turns off, like a light switch. The brain is "off" all night. Then in the morning, the light switch flicks back on, and you start being a person again.

That is not what happens.

When you sleep, your brain does not turn off. Your brain is still working. It is just doing different work than it does when you are awake.

Picture two kinds of work. When you are awake, your brain is busy with the day — looking, listening, walking, talking, learning, playing. When you are asleep, your brain is busy too, but with different jobs. It is sorting through what you learned that day. It is helping your body grow and repair. It is letting your feelings settle. It is cleaning itself.

Your eyes are closed. Your body is still. But inside your head, your brain is doing important work. Sleep is not "off." Sleep is a different kind of busy.

Sleep Comes in Cycles

Here is something most grown-ups do not know.

When you sleep at night, your brain does not just sleep one big sleep from when you close your eyes until morning. Your brain goes through several cycles during the night. Each cycle has different parts.

In some parts of a cycle, your sleep is deep. Your body is very still. You might be hard to wake up. This is when your body grows and repairs the most.

In other parts of a cycle, your sleep is lighter. Your brain is busier. Most dreams happen in these parts. You can sometimes wake up just a little — turn over, fix your blanket — and fall right back asleep.

You go through many cycles every night. You do not have to think about it. Your brain runs the cycles by itself. The Cat will tell you more about cycles when you are a little older. For now, just know this: your brain does not sit in one kind of sleep all night. It moves through different kinds [1, 2].

About Dreams

A dream is a story your brain makes while you sleep. Some dreams are silly. Some are happy. Some are exciting. Some are scary. Some are mixed up. Some make sense. Some do not.

Everyone dreams. Even babies dream. Even animals dream — a sleeping dog or cat sometimes twitches its paws or makes small sounds because it is dreaming.

You might not remember most of your dreams. That is normal. Some nights you remember a lot. Some nights you remember nothing. Both are okay.

The Cat will say more about hard dreams (called nightmares) in Lesson 3. For now, just know that dreams are a normal part of sleep. Your brain has been making them since you were very small.

How Much Sleep Kids Need

Doctors and scientists who study children's sleep have looked at sleep in thousands of kids. They have written down what they found. For kids ages 6 to 12, most kids do best with somewhere between 9 and 12 hours of sleep each night [3, 4].

That is a range, not a perfect number. Some kids do well with 9 hours. Some do well with 11. Some need closer to 12. Bodies are different.

Your trusted grown-ups know roughly what works for your body. They have watched you wake up many times. They have seen you on good-sleep days and bad-sleep days. If you and your grown-up are not sure how much sleep you need, your doctor can help figure that out.

The Cat is not going to tell you a single number. The Cat trusts you and your grown-ups to find what works.

What the Cat will tell you is this: kids your age usually do better with more sleep than less. Your body is growing. Your brain is learning. Both jobs take a lot of energy and time. Sleep is when most of that work gets done.

Every Animal Sleeps

The Cat wants to show you one more thing before this lesson ends.

Every animal sleeps. Not just cats and people. Not just dogs and horses. Every animal we have looked at — sleeps in some way [5].

• Cats sleep 12 to 16 hours a day, in many short naps.
• Dogs sleep about 12 to 14 hours.
• Dolphins sleep with half their brain at a time, so the other half can keep them swimming and breathing.
• Bats sleep up to 20 hours a day, hanging upside down.
• Giraffes sleep only about 4 to 5 hours, sometimes standing up.
• Even some fish sleep, in a quiet still way near the bottom of the water.

If every animal on Earth sleeps, that tells you something. Sleep is not a small thing. Sleep is something so important that every animal does it, even animals that have to keep moving or watching for danger. Animals have figured out tricky ways to sleep so they do not have to skip it.

You sleep because your body needs to sleep. You are not alone. Every cat, every dog, every bird, every kid in your class — everyone is sleeping.

Lesson Check

1. When you sleep, does your brain turn off? What does it do instead?
2. What is a cycle in sleep?
3. What is a dream?
4. About how many hours of sleep do kids your age usually need?
5. Why does the Cat say "every animal sleeps"?

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Lesson 1.2: How Sleep Helps You

Learning Objectives

By the end of this lesson, you will be able to:

• Name three ways sleep helps your body
• Name three ways sleep helps your brain
• Name four things that help most kids sleep better
• Notice your own bedtime routine
• Understand that different families do bedtime in different ways, and that is okay

Key Terms

The Cat Watches

The Cat has been watching humans sleep for a long time. The Cat thinks sleep is doing several jobs at once. None of the jobs are small. All of them matter.

Here is what sleep does for you. Listen quietly.

Sleep Helps Your Body

While you sleep, your body is busy in ways you might not have thought about.

Your body grows. Doctors and scientists who study kids' bodies have found that growing happens especially during sleep [6]. Your body releases special builders called growth hormones while you sleep, and those builders help your bones get longer and your muscles get stronger.

Your body repairs. Tiny scrapes, sore muscles, the small wear-and-tear of a busy day — your body fixes a lot of that while you sleep. Sleep is repair time for the body.

Your body fights off germs. Your body has a small army inside it that fights off germs and helps you stay healthy. That army does some of its best work while you sleep [7]. Kids who do not get enough sleep can get sick more often.

If you have read Coach Food (the Bear)'s chapter Food and Your Body, you know real food helps your body grow and stay healthy. The Bear and I agree on this: real food and good sleep work together. Both are important. Neither one can do the whole job alone.

Sleep Helps Your Brain

Coach Brain (the Turtle) and I work very closely on this. The Turtle teaches that your brain grows new connections every time you learn something new. I teach what happens to those connections at night.

While you sleep, your brain is busy with three big jobs.

Your brain saves what you learned that day. Imagine you learned a new word today. Or a new song. Or how to do something you could not do before. During the day, your brain makes a fresh, small connection for that new thing. At night, while you sleep, your brain goes back to that connection and saves it [8]. Without good sleep, today's learning is hard to keep tomorrow.

Your brain helps your feelings settle. A big day has a lot in it. You felt happy. You felt frustrated. Maybe you got embarrassed about something. Maybe you missed someone. Your brain works on those feelings while you sleep. Most mornings, things that felt big the night before feel a little smaller [9]. That is your brain doing its sleep work.

Your brain cleans itself. When you are awake, your brain is busy and a tiny bit of waste builds up inside. While you sleep, your brain has time to clean that waste out [10]. Just like your room gets messy when you use it all day and your grown-ups help tidy it up at night — your brain does its own tidying while you sleep.

You do not have to do anything for any of this. Your brain runs it all by itself, while you dream.

That is part of why kids who sleep well feel different the next day. They woke up to a brain that organized yesterday and got ready for today. Kids who did not sleep well wake up to a brain that did not get to finish its work. That is one of the reasons being tired feels the way it does.

Sleep Helps You Feel Ready for the Next Day

The Cat would add one more thing. Sleep helps you feel ready.

Have you ever noticed how a good night of sleep makes the next day easier? Things you would have struggled with feel smaller. Hard math is a little less hard. A new game is a little easier to learn. A friend who was annoying yesterday is not so annoying today.

Now think about a bad night of sleep. Things that should be easy feel harder. Your feelings come quicker and bigger. You might cry over something that on another day you would not have cried about. You might get mad faster. You might feel like nothing is fun.

That is not a problem with you. That is the difference one night of sleep makes.

The Cat watches this all the time. Sleep is one of the biggest reasons one day feels different from another. The Cat thinks every kid should know that.

Four Things That Help Most Kids Sleep Better

The Cat is not going to tell you the rules of your bedtime. Your trusted grown-ups know your bedtime. Every family does bedtime a little differently. Some families have early bedtimes. Some have later ones. Some kids share a room with a sibling. Some kids sleep in their own room. Some kids share a bed with a parent for a while. Some live in a small home. Some in a big one. Some kids have a bedtime story. Some have music. Some have a stuffed animal that goes with them. All of these are normal.

What the Cat can share is four things that research has found help most kids sleep better. These are things-that-help, not rules-you-must-follow. You and your grown-up can figure out what works best for your family.

1. A calm bedtime routine. Doing the same calm things in the same order most nights helps your body know that sleep is coming. A simple routine might be: brush teeth, put on pajamas, hug a grown-up goodnight, read a book or hear a story, lights out. The order does not matter much. The calmness matters [11].

2. A dark and quiet sleeping place. Most kids sleep best in a darker, quieter room. A little nightlight is fine if you like one. Earplugs or a small white-noise sound can help in noisy places. Your trusted grown-up will set up your sleeping space.

3. Going to bed and waking up at similar times most days. Bodies like patterns. When you go to bed and wake up at about the same times most days — yes, even on weekends — your body learns the pattern, and sleep comes easier. The Cat does not say exact same times. Similar times.

4. Dim light and no screens close to bedtime. Here is something interesting. Your brain reads light like a clock. Bright light, especially the light from screens (phones, tablets, TVs), can trick your brain into thinking it is still day [12]. When your brain thinks it is still day, it does not get ready for sleep. The Turtle and I both think this matters: many grown-ups do not realize that the screen they handed a kid before bed is making the kid less sleepy, not more. Quieter activity, dimmer light, and less screen time as bedtime gets close are things that help. Your grown-ups decide what works for your family.

These four are not magic. They are just things that help. If you already do most of them, that is great. If you do not do any of them, talk with your trusted grown-up. Small changes can make a difference.

Different Families, Different Bedtimes

One more important thing.

Families are different. Bedtimes are different. Sleeping arrangements are different. Some kids share a room with a brother or sister. Some kids sleep alone. Some families have always had a quiet, dark bedtime; some have a louder, busier one. Some cultures have parents and small children sleep close together. Some have kids sleep in their own rooms from very young. Some kids fall asleep with music; some need silence. Some have a parent who reads to them; some have a parent who hugs them and turns out the light.

All of these are normal. None of them is the "right" way.

The Cat is not going to tell you what bedtime should look like in your house. Your trusted grown-ups know what works for your family. The Cat just wants you to know what sleep is and why it matters. The how is your family's choice.

Notice Your Bedtime

Here is a small thing the Cat wants you to try. Tonight, when you go to bed, notice what your bedtime is like.

• What is the first thing that tells you bedtime is coming? Is it a clock? A grown-up's voice? A feeling in your body?
• What do you do in the hour before bed?
• Is your room bright or dim?
• Is it quiet or noisy?
• Do you fall asleep fast or slow most nights?

You do not have to write this down. Just notice. The Cat thinks just noticing your bedtime — really paying attention to it once or twice — teaches you a lot.

Lesson Check

1. Name two ways sleep helps your body.
2. Name two ways sleep helps your brain.
3. What are three of the four things that help most kids sleep better?
4. Why does light from screens make sleep harder?
5. The Cat says "different families do bedtime in different ways, and that is okay." Why is that important to remember?

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Lesson 1.3: When Sleep Is Hard

Learning Objectives

By the end of this lesson, you will be able to:

• Name three reasons sleep can be hard sometimes
• Know that nightmares are normal and happen to everyone
• Tell the difference between an everyday hard night and a problem that needs grown-up help
• Name three trusted grown-ups you can talk to about sleep worries
• Know what to do if a feeling at bedtime ever feels really scary or unsafe

Key Terms

The Cat Is Honest

The Cat is going to be honest with you. Sleep is not always easy.

Some nights, sleep comes fast. You close your eyes, and the next thing you know it is morning. Some nights, sleep takes longer. Some nights you have a strange dream you do not like. Some nights you lie in the dark and your brain will not stop thinking. Some nights you wake up in the middle of the night and cannot fall back asleep right away.

All of that happens. To kids. To grown-ups. To the Cat. To everyone.

When sleep is hard sometimes, that is normal. It does not mean anything is wrong with you. Your body and brain do not run perfectly every night. Nothing in nature runs perfectly every night.

But when sleep is hard a lot of nights in a row, that is something to talk about with a trusted grown-up. The Cat will tell you what to look for.

Reasons Sleep Can Be Hard

Sleep can be hard for many reasons. Here are some of the most common ones for kids your age.

Your body is not tired yet. Maybe you napped a lot in the day. Maybe you did not run around enough. Maybe you ate or drank something close to bedtime. Bodies do not always settle on the schedule we want.

Your brain is busy. Maybe you saw something exciting. Maybe you played a game right before bed. Maybe you watched something with bright pictures and loud sounds. A busy brain takes longer to slow down.

Something feels off. Maybe the room is too hot or too cold. Maybe a sound is bothering you. Maybe a pillow does not feel right. Bodies notice these things at bedtime even when you did not notice them all day.

A worry came up. Sometimes the day's worries come up at night. Maybe something happened at school. Maybe you are nervous about tomorrow. Maybe you are thinking about a friend, a sibling, a grown-up. Worries are sneaky. They often wait until the lights go out to show up.

A feeling is too big. Sometimes feelings get bigger at night. If you have read the Turtle's chapter Your Brain and You, you learned about big or hard feelings. Big feelings can make sleep hard.

You had a bad dream. Bad dreams happen to everyone. Sometimes they wake you up and your body feels jumpy for a while.

The Cat would not be surprised if you have had a hard night for any of these reasons. The Cat would also not be surprised if you have had a hard night for a different reason that is not on this list. Sleep is one of those things — sometimes it is hard, and we do not always know exactly why.

About Nightmares

A nightmare is a scary or upsetting dream. Nightmares happen to everyone. Adults have them. Kids have them. Even the Cat has them.

A nightmare is not a sign that something is wrong with you. Your brain makes stories every night while you sleep, and sometimes the stories are scary. We do not fully know why some dreams are scary and others are happy. That is one of the things scientists are still studying.

If you have a nightmare and wake up scared, here is what helps:

• Open your eyes and look around. You are in your bed. The dream is not real.
• Take a slow breath. In, out, in, out.
• If you can, tell a trusted grown-up. They can sit with you for a minute. A grown-up's voice helps a lot.
• Some kids drink a small sip of water, fix their pillow, or hug a stuffed animal. Find what works for you.

Nightmares almost always pass. The hard feeling fades pretty fast once you are awake. Within a few minutes, most kids are calm enough to fall back asleep.

The Cat wants you to know one more thing about nightmares. You did not make the nightmare happen. Nightmares come from your brain doing its sleep work. Sometimes the work is messy. That does not mean the nightmare is your fault, and it does not mean anything bad is going to happen.

When to Talk to a Trusted Grown-Up About Sleep

You have already learned about trusted grown-ups from the Bear and the Turtle. The Cat agrees with both of them. You talk to a trusted grown-up about sleep, just like you talk to a trusted grown-up about food and big feelings.

Trusted grown-ups for sleep can include:

• A parent or step-parent
• A grandparent, foster parent, or other caregiver
• A teacher you trust
• A school nurse
• Your doctor or pediatrician

You do not need a giant problem to talk to a trusted grown-up. A small change in sleep is worth mentioning. Grown-ups want to know. They are good at helping with sleep.

The Cat has a short list. If any of these are happening, please talk to a trusted grown-up:

• Sleep has been hard for many nights in a row
• You are having the same scary dream over and over
• You are scared to go to sleep
• You feel very worried at bedtime
• You wake up many times in the middle of the night and cannot fall back asleep
• You are tired during the day even after a full night in bed
• A big or hard feeling is coming up at night that you cannot shake
• You are having trouble sleeping because something happened that you do not know how to think about
• A friend or sibling is having any of these troubles

Telling a trusted grown-up is brave. Telling a trusted grown-up does not get you in trouble. The grown-up will listen. The grown-up may help with your bedtime routine, your room, or the worry that came up. If the grown-up needs more help, they may take you to your doctor. Doctors are very good at helping with sleep — they know lots of ways to help.

You do not need the perfect words. You can start simple:

• "Sleep has been hard lately."
• "I keep having a bad dream."
• "Something is bothering me at bedtime."
• "I do not want to go to sleep tonight."
• "I am tired in the day even though I went to bed."

Any of those is a great start.

When a Feeling at Bedtime Feels Really Scary or Unsafe

The Cat is going to be careful and clear here, because this part matters most.

Sometimes a feeling at bedtime can feel really scary or unsafe. Maybe you feel like the world is too dark. Maybe a feeling makes you not want to be here anymore. Maybe a worry is so big that you cannot even tell what it is.

If a feeling like that ever comes up — at bedtime, in the middle of the night, or any other time — please tell a trusted grown-up right away. Not in the morning. Right then. Wake a grown-up if you have to. They will not be mad. They will be glad you told them.

There are special phone numbers that grown-ups can use when feelings get really scary or unsafe. The Cat wants you to know these exist, so that if a feeling like this ever happens to you, you can tell a grown-up, and the grown-up can use one of these helpers. You do not have to remember the numbers. The grown-ups in your life can use them.

Helpers grown-ups can call when feelings feel really scary or unsafe:

• The 988 Suicide and Crisis Lifeline: a grown-up can call or text 988, day or night. Real people answer. They help right away.
• Crisis Text Line: a grown-up can text the word HOME to 741741, day or night. Real people answer by text.

Helpers grown-ups can call about other big or hard worries:

• SAMHSA National Helpline: 1-800-662-4357, day or night. Real people answer.
• The National Alliance for Eating Disorders (if a worry is about food or eating): 866-662-1235, on weekdays.

These helpers are for grown-ups to use when you and they need them. Kids your age do not call helplines on their own. You tell a trusted grown-up first. The grown-up takes care of the rest.

The Bear and the Turtle wrote about these helpers too. We are all saying the same thing. We agree.

Sleep Is a Friend

The Cat will end this lesson with one quiet thought.

Sleep is not your enemy. Sleep is not a punishment. Sleep is not a time you are missing out on the day. Sleep is a friend. Sleep is the part of your life when your body grows, your brain saves what you learned, your feelings settle, and your tired self gets to rest.

On nights when sleep comes easily, that is a gift. On nights when sleep is hard, that happens to everyone, and trusted grown-ups can help. You and sleep are on the same team. The Cat has watched humans for a very long time and has seen this be true.

Some nights are easier. Some nights are harder. Mostly, sleep does its job, and you wake up ready for tomorrow.

Goodnight, little reader. The Cat is glad you came.

Lesson Check

1. Name two reasons sleep can be hard sometimes.
2. Are nightmares a sign that something is wrong with you? What does the Cat say?
3. When should you talk to a trusted grown-up about sleep?
4. Who are two trusted grown-ups you could talk to about a sleep problem?
5. If a feeling at bedtime ever feels really scary or unsafe, what is the first thing the Cat says you should do?

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End-of-Chapter Activity: Two Nights, Noticing

The Cat has one activity for you. It is gentle. It takes two nights and two mornings, plus a few minutes of talking with a trusted grown-up. You can do this any week.

What You Need

• A piece of paper or a small notebook
• A pencil
• Two nights of your normal life
• A trusted grown-up to share with at the end

What You Do

Step 1 — Make a noticing sheet. Fold a piece of paper in half so it has two columns. Write at the top of the left column: Night 1. Write at the top of the right column: Night 2. Under each one, write four small headings: Bedtime feeling, How long to fall asleep, Dreams I remember, and Morning feeling.

Step 2 — Night 1. On the first night, after you have brushed your teeth and gotten ready for bed, take one slow breath. Then, before you go to sleep, write one short sentence under Bedtime feeling. Examples: "I feel calm and ready." "I feel a little worried about school." "I feel excited about tomorrow." Just notice and name.

Step 3 — Morning 1. In the morning, fill in the other three boxes for Night 1. How long to fall asleep: your best guess — fast, normal, slow. Dreams I remember: any dream you can recall, even a small piece. If you do not remember a dream, write "no dream that I remember." Morning feeling: a short sentence about how you feel waking up. Examples: "I feel rested." "I feel tired." "I feel happy."

Step 4 — Night 2. Do the same thing the second night. Before bed, write your Bedtime feeling. Then sleep.

Step 5 — Morning 2. Fill in the other three boxes for Night 2.

Step 6 — Compare and share. Look at your sheet. Are the two nights the same or different? Talk to a trusted grown-up about what you wrote. Ask them one of these:

• "Did anything seem different about the two nights?"
• "What helps you sleep best?"
• "What do you do if you cannot fall asleep?"

Listen to their answer. Grown-ups have learned a lot about their own sleep over the years.

Step 7 — Keep the sheet. Save your noticing sheet somewhere safe. You may want to look back at it later.

What You Will Get From This

You will start to notice your own sleep — what helps it, what makes it harder, what your mornings feel like after different kinds of nights. The Cat thinks this is one of the most useful skills a person can learn at any age. Most grown-ups have never thought about their sleep this carefully. You are starting young, and that is a good thing.

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Vocabulary Review

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Chapter Review

These questions are not a test. They are a way to check what you remember. Take your time. Look back at the lessons if you need to. There are no tricks.

1. When you sleep, does your brain turn off? What does it do instead?

2. Name three ways sleep helps your body or your brain.

3. What are three of the four things that help most kids sleep better?

4. Are nightmares normal? What does the Cat say to do if you have one?

5. When should you talk to a trusted grown-up about sleep?

6. If a feeling at bedtime ever feels really scary or unsafe, what is the first thing the Cat says you should do?

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Instructor's Guide

This guide is for parents, caregivers, teachers, and other grown-ups using this chapter with a child in Grade 3 (ages 8-9).

What This Chapter Teaches

This is the first chapter the child will read about sleep in the CryoCove Library. It is the foundation. The chapter teaches three big ideas at age-appropriate depth:

1. What sleep is. Sleep is not "off" — it is a different kind of busy. The brain does specific work during sleep that it cannot do while awake. Sleep happens in cycles. Dreams are a normal part of sleep. Kids ages 6-12 typically do well with somewhere in the 9-12 hour range per night, presented as a range based on AAP and AASM consensus, never as a prescriptive single number.

2. How sleep helps. Sleep helps the body grow, repair, and fight off germs. Sleep helps the brain save the day's learning, settle feelings, and clean itself. Four things that help most kids sleep better: a calm bedtime routine, a dark and quiet sleeping place, similar bedtimes and wake times most days, and dim light with limited screens close to bedtime. All four are presented as research-informed things-that-help, never as rules-you-must-follow.

3. When sleep is hard. This is the safety-critical lesson, paralleling the Food chapter (Lesson 3) and the Brain chapter (Lesson 3) in structure. The child learns that hard nights happen to everyone, that nightmares are normal, and that everyday sleep difficulty is the kind of thing you talk about with a trusted grown-up. The two-tier protective framing (everyday vs. urgent) matches the Brain chapter: everyday sleep difficulty → trusted grown-up; urgent (feelings feel really scary or unsafe) → grown-up calls a crisis line right away. Crisis-resource framing throughout is "grown-ups can call these if you need help" — not "you call these" — because eight- and nine-year-olds do not independently navigate crisis lines.

What This Chapter Does NOT Teach

This chapter is intentionally light on certain content that becomes appropriate at later grades:

• No sleep architecture detail. REM, NREM, sleep stages 1-4, brain waves, hypnograms — all of that is Grade 6 and above.
• No neuroanatomy of sleep. SCN, melatonin, adenosine, hypothalamus — not at Grade 3.
• No 90-minute cycle math. The chapter mentions that sleep has cycles but does not calculate them. Cycle math arrives in Grade 6.
• No screen-and-sleep deep dive. A brief mention only; the full chapter on screens and sleep arrives in Grade 7.
• No specific bedtime prescriptions. The chapter presents a range and trusts trusted grown-ups to decide specifics for each family.
• No clinical sleep vocabulary. Insomnia, sleep apnea, sleep terrors, restless legs — none of these are named at Grade 3. The chapter routes any persistent concern to "trusted grown-ups, including your doctor."

If your child asks questions in these areas, the best answer is: "That is a great question. Let's figure it out together." Then you, the trusted grown-up, decide what to share.

How to Support the Child

A few things you can do that align with the chapter's framing:

• Hold a calm wind-down. Even 15 minutes of slower activity, dimmer light, and one or two predictable steps (brushing teeth, putting on pajamas, reading or storytelling) helps your child's body know that sleep is coming.
• Be patient with bedtime worries. Many bedtime worries are small in the day and large at night. A minute of listening — not solving, just listening — is often what the worry needs.
• Decide as a family about screens close to bedtime. Research consistently shows light from screens delays sleep onset in children. Your family's specific rules are yours to set. Awareness of the effect helps you make those decisions deliberately.
• Model your own sleep. Children learn from what they see. A grown-up who treats sleep as important is one of the strongest signals a child gets that sleep is worth protecting.
• Be the one your child can come to about a hard night. The chapter explicitly tells the child to talk to a trusted grown-up if sleep gets hard for many nights. Make sure they know you are that grown-up.

Watching for Warning Signs

Children ages 8-9 are not too young to develop sleep problems that benefit from clinical support. The chapter is preventive, not reactive. But if you notice any of the following for more than two to three weeks, please contact your pediatrician or a qualified sleep clinician:

• Persistent trouble falling asleep or staying asleep
• Loud snoring, pauses in breathing during sleep, or gasping
• Daytime tiredness despite a full night in bed
• Repeated nightmares involving the same content
• Fear of going to bed
• Sleep disruptions that coincide with new worry, sadness, or behavior changes
• Any mention of not wanting to be here, wanting to hurt themselves, or feeling hopeless — these require immediate response, day or night

Verified resources (May 2026):

• 988 Suicide and Crisis Lifeline: call or text 988, 24/7. The right first call for any mention of suicide or self-harm.
• Crisis Text Line: text HOME to 741741, 24/7.
• SAMHSA National Helpline: 1-800-662-4357, 24/7. General mental health and substance use referrals.
• National Alliance for Eating Disorders: 866-662-1235, weekdays. Licensed therapists. Useful when eating concerns appear alongside sleep concerns.
• Your pediatrician is the best starting place for any persistent sleep concern that is not an acute crisis.

Note: the NEDA helpline (1-800-931-2237) is not functional as of this writing. Use the National Alliance for Eating Disorders number above instead.

Pacing

If you are using this chapter in a classroom:

If you are using this chapter at home, two lessons per week is comfortable. Lesson 3, like Lesson 3 of the Brain chapter, benefits from being read alongside a trusted grown-up so the child has someone right there if a worry comes up.

Lesson Check Answers

Lesson 1.1:

1. No. The brain does not turn off. It is doing different work than during the day — sorting through what you learned, helping the body grow and repair, letting feelings settle, cleaning itself. 2. One full pattern of sleep that happens many times through the night. The brain goes through several cycles. 3. A story your brain makes while you sleep. Sometimes you remember dreams; sometimes you do not. 4. Somewhere between 9 and 12 hours, depending on the child. 5. Because sleep is so important that every animal on Earth does it — even animals that have to keep moving or watching for danger. That tells us sleep is essential, not a small or skippable thing.

Lesson 1.2:

1. Sleep helps the body grow (growth hormones), repair (fix small wear-and-tear), and fight off germs (the immune system does important work during sleep). Any two. 2. Sleep helps the brain save what you learned, helps feelings settle, and cleans itself. Any two. 3. Any three of: a calm bedtime routine; a dark and quiet sleeping place; similar bedtimes and wake times most days; dim light and no screens close to bedtime. 4. Because bright light, especially from screens, can trick the brain into thinking it is still daytime — so the brain does not get ready for sleep. 5. Because not every family does bedtime the same way, and that is normal. The Cat trusts trusted grown-ups to decide what works for each family.

Lesson 1.3:

1. Any two of: body is not tired yet; brain is busy; something feels off; a worry came up; a feeling is too big; you had a bad dream. 2. No. Nightmares are normal and happen to everyone — adults, kids, even cats. The Cat says to open your eyes, take a slow breath, tell a trusted grown-up if you can, and remember that the dream is not real. 3. When sleep has been hard for many nights in a row, when nightmares keep coming back, when you are scared to go to sleep, when you wake up many times and cannot fall back asleep, when you are tired in the day even after a full night in bed, when a big or hard feeling is coming up at night. 4. Any two real grown-ups in the child's life who care for them. 5. Tell a trusted grown-up right away. The grown-up can use a crisis helpline if needed.

Chapter Review Answers

1. No — the brain does not turn off. It does different work while you sleep: sorting through what you learned, helping the body grow and repair, letting feelings settle, cleaning itself. 2. Any three from across both body and brain lists (body grows, body repairs, body fights germs, brain saves learning, brain settles feelings, brain cleans itself). 3. Any three of: calm bedtime routine; dark quiet sleeping place; similar bedtimes most days; dim light and no screens close to bedtime. 4. Yes. Open your eyes, take a slow breath, tell a trusted grown-up if you can, and remember the dream is not real. 5. When sleep has been hard for many nights, when scary dreams keep coming back, when bedtime worry will not lift, when you are scared to go to sleep, when you are tired during the day after a full night in bed, when a big or hard feeling shows up at bedtime. 6. Tell a trusted grown-up right away. The grown-up can use a crisis line if needed.

Discussion Prompts

Open-ended questions to ask the child after the chapter:

1. What surprised you most about what your brain does while you sleep?
2. What is one thing about your bedtime routine that you think helps you sleep? What is one thing you think makes it harder?
3. Have you ever had a really good night of sleep? How did you feel the next day?
4. Have you ever had a really hard night of sleep? How did you feel the next day?
5. Who is one trusted grown-up you could talk to about sleep? Why that person?
6. What is one thing the Cat said that you would like to tell a friend about?
7. The Cat says "every animal sleeps." What animal sleeps in a way that surprised you?
8. If you had to pick one of the Cat's four things-that-help to try this week, which would it be?

Common Child Questions

• "Why do I sometimes dream weird stuff?" Your brain makes stories while you sleep. The stories are made out of bits of your day, your feelings, and things you remember. Sometimes the bits get put together in strange ways. Nobody fully knows why. The Cat thinks dreams are one of the most interesting things in nature.
• "What if I have a bad dream tonight?" Bad dreams happen to everyone. If you wake up scared, open your eyes, look around your room, take a slow breath, and tell a trusted grown-up if one is nearby. The dream will fade. You can fall back asleep.
• "Why does my little brother need more sleep than me?" Younger kids' bodies and brains need more sleep because they are growing faster. As kids get older, they need a little less. By the time you are a grown-up, you will need about 7-9 hours. Babies need 14-17 hours. Bodies change.
• "Is it bad if I do not always remember my dreams?" No, not at all. Most people forget most of their dreams. Some nights you will remember a lot. Some nights you will not remember anything. Both are normal.
• "Why do I sometimes wake up in the middle of the night?" Most people wake up briefly several times every night. Usually they fall right back asleep and do not remember. If you wake up and have trouble falling back asleep, try a slow breath, fix your blanket, and notice your body settling.
• "What if I cannot fall asleep?" Tell a trusted grown-up. They can help with the room, the routine, the worry, or anything else getting in the way. If you and your grown-ups cannot figure it out, a doctor can help.
• "Do animals have nightmares?" Probably yes — at least many mammals do. Sleeping dogs sometimes whimper or kick their legs. Cats sometimes make small sounds. We cannot ask them, but their brains do many of the same sleep things human brains do.
• "Why is bedtime hard sometimes?" Lots of reasons. Sometimes your body is not tired. Sometimes your brain is excited. Sometimes a worry shows up. Sometimes the room feels off. The Cat thinks the most important thing is to notice it, name it, and tell a trusted grown-up.

Parent Communication Template

Dear families,

Your child is beginning the first chapter of the CryoCove Library Coach Sleep curriculum — Your Sleep and You. This is a Grade 3 chapter at the very start of a long curriculum that will continue through high school and beyond.

What the chapter covers:

• What sleep is (an active kind of brain work, not "off")
• The basic idea that sleep comes in cycles (without the architecture detail that arrives in Grade 6)
• How sleep helps the body grow, repair, and fight off germs
• How sleep helps the brain save learning, settle feelings, and clean itself
• Four research-informed things that help most kids sleep better
• What to do when sleep is hard, including when to talk to a trusted grown-up

Tone: The chapter is calm and direct, modeling the slow-down rhythm of bedtime. The Cat character does not give commands. Sleep recommendations are framed as a range (9-12 hours per night for ages 8-9), not as a single prescriptive number. The chapter explicitly recognizes that different families have different bedtime practices, sleeping arrangements, and routines, and all of these are normal.

What this chapter does not teach: sleep architecture (REM, NREM, hypnograms — Grade 6), neuroanatomy of sleep (Grade 8+), cycle math (Grade 6), specific clinical sleep disorders (routed to doctors), or specific bedtime prescriptions. The chapter trusts you to decide what works for your family.

End-of-chapter activity: Your child will fill out a small two-night noticing sheet — bedtime feeling, how long to fall asleep, dreams remembered, morning feeling — and share it with a trusted grown-up (you, if available). Please support this activity. It is a low-pressure way to talk about sleep together for a few minutes.

A note on Lesson 3: Lesson 3 covers when sleep is hard and when to seek grown-up help. The chapter mentions crisis resources (988 Suicide & Crisis Lifeline; Crisis Text Line — text HOME to 741741; SAMHSA National Helpline; National Alliance for Eating Disorders) at age-appropriate framing: "grown-ups can call these if you need help" — never "you call these." Kids ages 8-9 do not independently navigate crisis lines, and the chapter is careful about that. If you would like to read Lesson 3 alongside your child, that is welcome.

Warning signs we ask families to notice: This chapter teaches your child to talk to a trusted grown-up if sleep gets hard for many nights. If you notice persistent trouble falling or staying asleep, daytime fatigue, repeated distressing nightmares, fear of bedtime, or any mention of not wanting to be here, please contact your pediatrician or a qualified clinician. Verified resources are listed in the Instructor's Guide section of the chapter.

If you have any questions, please reach out to your child's teacher or to us at the CryoCove team.

Warmly, The CryoCove Curriculum Team

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Illustration Briefs

Lesson 1.1 — Awake vs. Asleep Placement: After "Sleep Is Not 'Off'." Scene: Two side-by-side simple drawings of the same child. Left panel: child is awake — eyes open, sitting up reading a book. A small sun shines above. Label: "Awake — brain busy with the day." Right panel: same child asleep in bed — eyes closed, blanket up to the chin, peaceful. A small moon and one star above. Label: "Asleep — brain busy in a different way." Coach Sleep (the Cat) curls in a corner between them with eyes half-closed. Mood: warm, calm, never spooky. The two panels should feel like two sides of one coin, not opposites in tension. Aspect ratio: 16:9 web, 4:3 print.

Lesson 1.2 — Four Things That Help Placement: After "Four Things That Help Most Kids Sleep Better." Scene: A simple four-square chart with one small drawing in each square. Top-left: a child brushing teeth in pajamas, label "A calm routine." Top-right: a softly lit bedroom with a child tucked in, label "A dark, quiet place." Bottom-left: a clock-and-calendar combo showing similar bedtime/wake times across the days of the week, label "Similar times most days." Bottom-right: a turned-off phone and tablet on a shelf next to a closed book by a bed, label "Dim light, no screens close to bedtime." Coach Sleep (the Cat) sits in the middle of the chart, eyes half-closed, calm. Mood: warm, soft, never strict or scolding. Each panel should look inviting, not like a rule list. Aspect ratio: 16:9 web, 4:3 print.

Lesson 1.3 — A Trusted Grown-Up at Bedtime Placement: After "When to Talk to a Trusted Grown-Up About Sleep." Scene: A child sitting up in bed under a soft nightlight, with a trusted grown-up sitting on the edge of the bed listening calmly. The grown-up has a kind, attentive face and one hand resting gently on the bed near the child. The child looks a little worried but safe. Coach Sleep (the Cat) sits at the foot of the bed, eyes half-closed, quiet. Around the picture float small word-bubbles with worry words: "bad dream," "worry," "tired." Mood: safe, warm, never alone. Lighting is soft, dim, nighttime — but not dark or scary. The room is small and ordinary — not luxurious — so the picture is inclusive of all kinds of families and homes. Aspect ratio: 16:9 web, 4:3 print.

Optional — Lesson 1.1: Animals Sleeping Placement: After "Every Animal Sleeps." Scene: A row of small illustrations: a sleeping house cat curled up on a sunny windowsill; a bat hanging upside down in a tree; a dolphin swimming slowly with one eye closed; a giraffe standing asleep with eyes half-closed; a small fish resting near the bottom of a pond. Each labeled with sleep hours per day. Coach Sleep (the Cat) stands at one end of the row, eyes half-closed, watching the others. Mood: gentle, wondrous, never zoo-like or busy — each animal should feel peaceful in its own way. Aspect ratio: 16:9 web, 4:3 print.

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Citations

1. Carskadon, M. A., & Dement, W. C. (2017). Normal human sleep: an overview. In M. H. Kryger, T. Roth, & W. C. Dement (Eds.), Principles and Practice of Sleep Medicine (6th ed., pp. 15-24). Elsevier.

2. Mindell, J. A., & Owens, J. A. (2015). A Clinical Guide to Pediatric Sleep: Diagnosis and Management of Sleep Problems (3rd ed.). Wolters Kluwer.

3. Paruthi, S., Brooks, L. J., D'Ambrosio, C., Hall, W. A., Kotagal, S., Lloyd, R. M., Malow, B. A., Maski, K., Nichols, C., Quan, S. F., Rosen, C. L., Troester, M. M., & Wise, M. S. (2016). Recommended amount of sleep for pediatric populations: a consensus statement of the American Academy of Sleep Medicine. Journal of Clinical Sleep Medicine, 12(6), 785-786.

4. Hirshkowitz, M., Whiton, K., Albert, S. M., Alessi, C., Bruni, O., DonCarlos, L., Hazen, N., Herman, J., Katz, E. S., Kheirandish-Gozal, L., Neubauer, D. N., O'Donnell, A. E., Ohayon, M., Peever, J., Rawding, R., Sachdeva, R. C., Setters, B., Vitiello, M. V., Ware, J. C., & Adams Hillard, P. J. (2015). National Sleep Foundation's sleep time duration recommendations: methodology and results summary. Sleep Health, 1(1), 40-43.

5. Siegel, J. M. (2008). Do all animals sleep? Trends in Neurosciences, 31(4), 208-213.

6. Takahashi, Y., Kipnis, D. M., & Daughaday, W. H. (1968). Growth hormone secretion during sleep. Journal of Clinical Investigation, 47(9), 2079-2090.

7. Besedovsky, L., Lange, T., & Haack, M. (2019). The sleep-immune crosstalk in health and disease. Physiological Reviews, 99(3), 1325-1380.

8. Walker, M. P., & Stickgold, R. (2006). Sleep, memory, and plasticity. Annual Review of Psychology, 57, 139-166.

9. Goldstein, A. N., & Walker, M. P. (2014). The role of sleep in emotional brain function. Annual Review of Clinical Psychology, 10, 679-708.

10. Xie, L., Kang, H., Xu, Q., Chen, M. J., Liao, Y., Thiyagarajan, M., O'Donnell, J., Christensen, D. J., Nicholson, C., Iliff, J. J., Takano, T., Deane, R., & Nedergaard, M. (2013). Sleep drives metabolite clearance from the adult brain. Science, 342(6156), 373-377.

11. Mindell, J. A., Telofski, L. S., Wiegand, B., & Kurtz, E. S. (2009). A nightly bedtime routine: impact on sleep in young children and maternal mood. Sleep, 32(5), 599-606.

12. Hale, L., & Guan, S. (2015). Screen time and sleep among school-aged children and adolescents: a systematic literature review. Sleep Medicine Reviews, 21, 50-58.

13. Owens, J. A., & Adolescent Sleep Working Group, Committee on Adolescence. (2014). Insufficient sleep in adolescents and young adults: an update on causes and consequences. Pediatrics, 134(3), e921-e932.