Sleep • Family & Parenting

The Back-to-School Sleep Reset

How to move your child’s body clock back to a school schedule — and how to stop fighting about it every morning. A step-by-step plan for elementary, middle, and high school families.

Ages 5–18 Start 2–4 weeks out Free one-page guide included

Every August, the same thing happens in millions of homes.

Somewhere in the middle of summer, bedtime slid from 9:00 to 10:30 to “whenever.” Wake-up time drifted from 7:00 to 9:30 to noon. Nobody decided this. It just happened.

Then, on a Monday morning in late August, the family is supposed to produce a cheerful, wide-awake, well-fed kid at a bus stop at 7:10 a.m.

It does not go well.

And here’s the important part: it does not go well because of biology, not because of attitude or laziness.

Your child’s body spent eight to ten weeks learning a new schedule. Their internal clock physically moved. Asking them to undo that in one Sunday night is a lot like flying them to Europe and expecting them to be sharp on their first morning there.

This guide shows you how to move that clock on purpose — slowly, ahead of time, and without turning your mornings into a war.

Part One

What changed over the summer

First, a quick look at what sleep actually is

Sleep isn’t one single “off” state. When we sleep, we move through four different stages, and each one has a different job.

Stage N1 Drifting off. The light, in-between stage where you’re just starting to fall asleep. It lasts a few minutes and it’s easy to be woken from.

Stage N2 Stable light sleep. The body settles in, heart rate and temperature drop, and the brain files away what you learned that day. We spend the most time here.

Stage N3 Deep sleep, also called slow-wave sleep. The hardest stage to wake someone out of. The body does its physical repair work and releases growth hormone.

REM Dreaming sleep, named for the rapid eye movements that happen during it. Most vivid dreaming happens here, along with emotional processing and memory.

We don’t go through those stages just once a night. We cycle through all four stages roughly 4 to 6 times, and each cycle takes about 90 minutes. The mix changes as the night goes on — deep sleep is loaded into the first half of the night, and REM dreaming sleep gets longer and longer toward morning.

A simplified hypnogram — the chart sleep labs use to map a night. Notice the shape: the deep N3 valleys are front-loaded, while the REM plateaus stretch longer and longer toward morning. That shape is why an early alarm cuts mostly REM — a detail that comes back in Part Six.

Want to go deeper? For a fuller walkthrough of how sleep works — and a downloadable planner you can use with your family — visit the Sleep Planner Tool.

What runs the whole process

That entire cycle — when it starts, how long it lasts, and how well it holds together — is run by two systems working together.

System 1: Sleep pressure. The longer your child is awake, the more a chemical called adenosine — a natural chemical that builds up in the brain while you’re awake and creates the feeling of getting sleepy — piles up. The more that builds, the sleepier they get. Sleep clears it out.

System 2: The body clock. This is the circadian rhythm — your body’s built-in 24-hour clock that decides when you feel awake and when you feel sleepy. It lives in a tiny cluster of cells in the brain called the suprachiasmatic nucleus, or SCN — basically the brain’s master timekeeper (Czeisler & Buxton, 2017).

Light is what sets that clock. Special light-sensing cells in the eye send a signal straight to the SCN. The SCN then decides when to release melatonin — a hormone that tells every part of the body “it is now nighttime.”

Here’s something most parents get wrong: melatonin does not knock your child out. It isn’t a sleeping pill. It’s an announcement. It tells the body night has arrived, and then the body does the rest — temperature drops, alertness fades, and the brain gets ready to switch over to sleep (Czeisler & Buxton, 2017).

Over the summer, three things went wrong at once

Too much light at night. Screens, lamps, and staying out until dark kept telling the brain “the day isn’t over yet.” Chang et al. (2015) found that light in the evening lowers melatonin and pushes the body clock later.
Not enough light in the morning. Sleeping until 10 a.m. means missing the strongest clock-setting signal there is. The simple rule: morning light pulls the clock earlier, evening light pushes it later. Skip the morning light, add the evening light, and the clock drifts later week after week (Eastman et al., 1994; Smith et al., 2009).
No set wake-up time. Wake-up time is the anchor for the whole system. Take it away, and the clock just floats.

The result is a real, measurable shift. This isn’t a figure of speech. The clock actually moved.

For teenagers, the clock had already moved

Here’s the part that solves a lot of arguments.

When kids hit puberty, their body clock shifts later on its own. This is called a phase delay — a real change in the timing of when the body wants to sleep and wake. During puberty, the brain’s clock becomes more sensitive to evening light and less sensitive to morning light. That pushes everything later.

How much later? About 1.5 to 3 hours compared to when they were little (Carskadon & Dement, 2017; Czeisler & Buxton, 2017).

In plain terms: a typical 16-year-old’s body isn’t ready for sleep until around 11 p.m. or midnight. Not because of the phone. Not because they’re undisciplined. Because of how the teenage brain is built. Czeisler and Buxton (2017) call this one of the most solid, universal findings in the whole science of body clocks.

Your teenager who can’t fall asleep at 9:30 and can’t function at 6 a.m. is telling you the truth. Summer then added more delay on top of that.

That’s why the teen reset is the hardest one in the house — and why it needs the longest head start.

Part Two

The brain learns what the bed means

There’s a second thing going on, and it explains why some kids still lie awake for an hour even after you move bedtime earlier.

The brain is constantly learning. And it learns what the bed means based on what keeps happening there.

This is called classical conditioning — when your brain automatically links two things together because they keep happening at the same time. (Think of a dog drooling at the sound of a can opener.) Sleep specialists use this idea in a treatment called stimulus control — a set of simple rules that retrain the brain to link the bed with sleep and nothing else (Bootzin & Perlis, 1992).

If the bed is where your child scrolls, texts, games, watches shows, does homework, argues with a sibling, and lies awake worrying — the brain learns: bed means being awake. Getting in bed becomes a signal to wake up. Which is the exact opposite of what you want.

If the bed is where sleep happens and almost nothing else — the brain learns: bed means sleep.

That signal does real work. It’s free. It’s powerful. And most families spent the summer accidentally training it backwards.

The house rules version

The rule	What it looks like at home
Only go to bed when sleepy	There’s a difference between sleepy (eyes heavy, head nodding) and tired (worn out but wired). Send them when they’re sleepy, not just when the clock says so.
Bed is for sleep only	No phone, tablet, gaming, TV, or homework in bed. Homework at a desk. Reading in a chair.
Up after about 20 minutes awake	If they’re lying there frustrated, have them get up, go somewhere dim, do something calm and boring, and come back when drowsy. Lying awake in bed teaches the brain the wrong lesson.
Go back only when sleepy	Not just when they’re bored of the chair.
Same wake-up time, 7 days a week	This is the single most powerful rule on the list.
No late naps	If a nap is needed, keep it short and early. The 4:30 p.m. couch crash wipes out the sleepiness you need at bedtime.

One thing surprises people: many sleep specialists ask families to keep even reading out of the bed. Reading feels calming — and it is. But it’s also something the brain does all day long while wide awake. Put a comfy chair in the room for reading, and move to the bed only when sleepy. That keeps the signal clean (Kryger et al., 2022).

If you do only one thing, do this one

Keep the wake-up time the same every day — including weekends.

Wake-up time anchors the body clock and controls how sleepiness builds during the day. In the professional version of this treatment, it’s often the single most effective piece (Bootzin & Perlis, 1992).

This is also where most families throw away all their progress.

A teenager who wakes at 6:30 on school days and 11:30 on weekends is giving their body a five-hour time-zone change every Friday, then flipping it back every Sunday. There’s a name for this: social jet lag — the jet-lagged feeling you get from a weekday-versus-weekend sleep schedule, without ever leaving town. The clock never gets a chance to settle.

Once school starts, weekend sleeping in should be capped at about one extra hour. Two at the absolute most.

Part Three

How many weeks before school should you start?

The basic idea from sleep medicine is: move it a little at a time and let the clock catch up.

The professional protocol for a badly delayed clock moves wake-up time earlier by 15 to 30 minutes every 3 to 7 days, with morning light locking in each new time. For the milder version most families need, 15 minutes earlier every 2 nights works well.

That gives you the math. Figure out the gap between where your child sleeps now and where they need to be, then divide.

Do this tonight

1 Find the forced wake time.What time does school make them get up? Include the shower, breakfast, and the drive.

2 Count backward to a target bedtime.From that wake time, subtract the hours of sleep they need for their age (see Part Four).

3 Write down where they actually are.What time are they really falling asleep and waking up right now? Be honest, not aspirational.

4 The difference is your gap.That’s the distance the clock has to travel.

5 Divide it by 15 minutes every 2 nights.A 2-hour gap takes about 16 days. A 3-hour gap takes about 24 days.

How much head start you need

Age group	How far they’ve drifted	Start the reset	How fast to move
Elementary (5–10)	1–1.5 hours	10–14 days before	15 min every 2 nights
Upper elementary / middle (11–13)	1.5–2.5 hours	2–3 weeks before	15 min every 2 nights
High school (14–18)	2–4 hours	3–4 weeks before	15 min every 2–3 nights

Reading this and school starts next week? You’re not out of luck — you’re just out of runway. Move in 30-minute jumps every night instead. Go hard on the morning light. And tell your kids honestly: the first week will be rough, and then it gets better.

A partial shift beats no shift. After that, protect the wake-up time hard for the first three weeks of school and the clock will finish catching up on its own.

Part Four

What each age group needs

Sleep needs change as kids grow, because the job sleep is doing changes.

Deep sleep — the heaviest, hardest-to-wake-from stage, also called N3 or slow-wave sleep — is when the body releases growth hormone, the hormone that builds bone, muscle, and tissue (Van Cauter et al., 2000). That’s not a small thing for a growing kid.

REM sleep — the dreaming stage — is when the brain sorts through emotions and memories. It also supports the slow build-out of the prefrontal cortex, the front part of the brain that handles planning, judgment, and self-control. That region keeps developing into the mid-twenties.

How much sleep, by age

Age group	Sleep needed (per 24 hours)	What sleep is doing
Preschool (3–5)	10–13 hours	Building the self-control part of the brain; lots of deep sleep
Elementary (6–12)	9–12 hours	Locking in what they learned at school; physical growth
Teens (13–17)	8–10 hours	Emotional processing, brain maturing, growth spurts — all fighting a delayed clock
College age (18+)	7–9 hours	Focus, memory, emotional steadiness

Most teens aren’t getting there. Wheaton and colleagues (2018) found that only 57.8% of U.S. high school students get eight or more hours on school nights — well short of the 8 to 10 hours pediatricians recommend.

Elementary (ages 5–10): the “I’m not tired” stage

The good news: Little kids are naturally early birds. Kids shift toward being night owls gradually through the teen years, peaking in the mid-to-late teens (Roenneberg et al., 2004). That means your elementary kid will bounce back to an early schedule faster than anyone else in the house.

What makes it tricky:

Bedtime stalling gets rewarded without you meaning to. When “one more drink of water” or “one more story” earns extra attention, more negotiating, or a trip to your bed, the stalling gets stronger. The fix isn’t more negotiating — it’s a warm, predictable, slightly boring routine and a limit that doesn’t move.
Their deep sleep is enormous. This is why a 7-year-old can sleep through a thunderstorm. It’s also why ages 4 to 8 are peak years for sleepwalking and night terrors. Being overtired and on a chaotic schedule makes those worse — so the reset actually helps.
Naps. If your kindergartener still naps, keep it short and before 3 p.m. during the transition. A long late nap erases the sleepiness you need at bedtime.
They need a lot of hours. A 7-year-old who has to wake at 6:45 needs to be asleep — not in bed, asleep — around 8:15 to 9:15 p.m. Count backward from there and add 20 to 30 minutes for the wind-down.

Middle school (ages 11–13): the in-between years

This is where it starts getting harder.

The clock delay is beginning because of puberty — but school start times often get earlier at exactly this age. Bad timing.
Phones usually show up now. Evening screen light directly lowers melatonin (Chang et al., 2015). This is the age to set the rule that phones charge outside the bedroom. Trying to install that rule at 16 is much, much harder.
Activities and homework squeeze the evening. Something gets cut, and it’s almost always sleep.
They’re old enough to get the science. Explaining why — the clock, the light, the melatonin — earns real cooperation at this age. Just laying down the law earns pushback.

High school (ages 14–18): the hardest reset in the house

The delay is at its maximum. Their body may not be ready for sleep until 11 p.m. or midnight (Carskadon & Dement, 2017). Longest head start, most patience needed.
Early alarms cut REM sleep specifically. REM is packed into the last third of the night. So when you wake a delayed teenager early, you’re cutting mostly REM — the stage that handles emotions. This is why an under-slept teenager isn’t just tired, they’re emotionally raw. The snapping and the tears are a symptom, not a personality problem.
The stakes are real. Owens et al. (2014) found that ongoing sleep loss in teens is linked to higher rates of depression, anxiety, suicidal thoughts, obesity, drowsy-driving crashes, and worse grades. That’s why the American Academy of Pediatrics officially recommends middle and high schools start no earlier than 8:30 a.m.
Driving matters. If your teen drives to school, the first two weeks — while the clock is still catching up — carry genuine risk. Consider carpooling or driving them yourself through the transition.
Caffeine. Energy drinks are everywhere in high school. Caffeine stays strong for 5 to 7 hours and takes about 10 hours to fully leave the body. Drake et al. (2013) found that caffeine taken even six hours before bed measurably cuts total sleep. That 3 p.m. energy drink is still working at 10 p.m. Set a hard cutoff — early afternoon at the latest.
Let them own it. Sleep specialists who work with teens are specifically taught to work with the teenager rather than issue orders, and to put parents in a support role. A plan a 16-year-old helped build is a plan a 16-year-old might actually follow.

Part Five

The actual plan

Two to four weeks out — start here

Every day, no exceptions:

Get morning light within 30 minutes of waking up. This is the engine of the entire plan. Go outside — a walk, breakfast on the porch, the drive with the window down. Outdoor light is dramatically brighter than indoor light. (Brightness is measured in lux — a unit of light intensity. Outdoors is around 10,000 lux. A normal lit room is only 100 to 500.) Aim for 15 to 30 minutes. And timing matters: light works best early. Too late in the morning and you lose the effect (Eastman et al., 1994; Smith et al., 2009).
Move wake-up time 15 minutes earlier every 2 nights. Wake time leads. Bedtime follows on its own. Do not start by moving bedtime earlier — a kid who isn’t sleepy yet will just lie there getting frustrated, which teaches the brain that bed means frustration.
Dim the house 2 hours before target bedtime. Melatonin starts releasing roughly two hours before sleep. Bright light in that window delays it (Chang et al., 2015). Turn off overheads, use lamps, switch devices to night mode — or better yet, put them away.
Screens off 60 minutes before bed, charging outside the bedroom. A phone within arm’s reach invites late scrolling, and that light pushes the whole night later (Chang et al., 2015).
Caffeine cutoff by early afternoon.
Move exercise earlier. Hard exercise raises stress hormones that keep the body revved up. Most vigorous activity is best finished at least three hours before bed.
Warm bath or shower about an hour before bed. This one’s real physiology, not folklore. Warming the body sends blood to the skin, so afterward the body’s core temperature drops faster — and that drop is one of the strongest “start sleeping” signals the body has. Haghayegh et al. (2019) found it measurably shortens how long it takes to fall asleep.

One week out

Do a full dress rehearsal. Run the real school-day schedule, including getting dressed and eating breakfast at the actual time.
Lock in the wind-down routine and keep it identical every night. The sameness itself becomes a sleep signal to the brain.
Check the bedroom. Cool (around 65–68°F), dark, quiet. Temperature isn’t about comfort — the body literally needs its core temperature to drop to start sleep, and a warm room fights that.
Have the worry conversation early. Nerves about a new teacher, a new school, or a locker combination are a huge cause of first-week insomnia. Deal with it at dinner, not at lights-out. If your child is a worrier, have them write the worries down earlier in the evening, somewhere outside the bedroom. It gets the worry off the pillow.

The last weekend

Hold the wake-up time. Don’t let one Saturday undo three weeks.
Prep everything the night before — clothes out, bags packed, breakfast ready. Every decision you remove from the morning is one less fight.
Put the alarm across the room so getting up is required.

The first two weeks of school

Hold the wake-up time. All seven days. Weekend sleep-in capped at one hour.
Keep the morning light going.
Expect a rough patch around days 3 to 5. The clock is still catching up. Say it out loud to your kids — “this part is supposed to be hard, and it gets better” is genuinely helpful information for a struggling teenager.

Part Six

What’s happening in their body at 6:45 a.m.

This section changes how a lot of parents run their mornings. It’s worth reading closely.

In the last hours of sleep, the body is already getting ready to wake up. Melatonin is fading out. And cortisol — the body’s main alertness-and-stress hormone — starts climbing in a sharp surge right before dawn.

This surge has a name: the cortisol awakening response — the natural jump in cortisol in the early morning that lifts the brain up toward being awake and gets the body ready for the day (Clow et al., 2010).

At the same time, body temperature starts rising again, the brain’s wake-up chemicals switch back on, and heart rate and blood pressure begin climbing.

Three things follow from that. All three matter.

1. Your child wakes up already flooded with a stress hormone

Cortisol is the alertness hormone and the stress hormone — same chemical, both jobs. The moment your child opens their eyes, it’s surging on purpose. That surge is what’s pulling them into consciousness.

Now picture a parent flipping on the overhead light and raising their voice.

You just stacked an outside stress response on top of a hormone that’s already at its daily peak. The predictable result is a kid who is reactive, defensive, teary, or hostile — and a parent who concludes the kid is being difficult.

They’re not being difficult. Their body is already running hot, and you added to it.

2. That heavy, foggy grogginess is a real thing

Waking up at the end of a sleep cycle — out of light sleep or dreaming sleep — feels clean. Waking up out of deep sleep feels like climbing out of wet sand.

That thick, disoriented, “leave me alone” fog has a name: sleep inertia — the groggy, half-functional state right after waking, especially after being pulled out of deep sleep. It’s normal physiology. It is not defiance.

Here’s the catch: a sleep-deprived kid spends more of the night in deep sleep, because the brain prioritizes it when it’s behind. Which makes them more likely to get yanked out of deep sleep by an alarm. That’s exactly why this whole reset matters — a well-rested kid is far easier to wake up.

Two things help:

Wake them gradually. Light in the room, a soft sound, a few minutes of warning — instead of a jolt.
Consider a sunrise alarm clock. These slowly brighten over 20 to 30 minutes before wake time. They’re a legitimate tool for someone who has to get up while their body clock still says night.

3. They will not be hungry — and pushing food will start a fight

This is the part parents almost never connect.

That cortisol surge, plus the general “get moving” activation of waking up, plus the fog of sleep inertia, commonly shuts down morning appetite. The body is in alert-and-mobilize mode, not digest mode.

A kid who says “I’m not hungry” at 7 a.m. is usually telling the truth.

But breakfast still matters — and here’s a reason most people haven’t heard. Light sets the clock in the brain. Food sets the clocks in the body. Your liver, gut, and pancreas each run their own small clocks, and eating the first meal at a consistent time keeps those in sync with the brain’s clock, which helps steady blood sugar (Wehrens et al., 2017). Skipping breakfast entirely also sets up a crash in the middle of the school morning.

What to do instead of fighting about it:

Give it more time. Get them up 20 to 30 minutes earlier so appetite has a chance to switch on. Hunger usually shows up 30 to 45 minutes after waking.
Start with liquid, not a plate. Kids wake up slightly dehydrated — you lose water all night just from breathing. Even mild dehydration lowers alertness and memory and worsens mood (Ganio et al., 2011). Water or milk is much easier to accept than food.
Keep it small and protein-based. Yogurt, a hard-boiled egg, a smoothie, peanut butter toast. Amount isn’t the goal. Something is the goal.
Send the rest with them. A second breakfast eaten at 9:30 when they’re finally hungry is a win, not a failure.
Light and movement first. Morning light and a few minutes of moving around raise body temperature and finish waking the body up. Appetite usually follows.

One note for the grown-ups: coffee works better if you wait about 90 minutes after waking. You’re already riding a natural surge of alertness hormones. Stacking caffeine on top of the peak mostly buys you a harder crash later.

Part Seven

Connect first, then redirect

Everything above is science. This part is relationship — and it decides whether the science ever gets a chance to work.

Here’s the standard morning: parent opens the door, flips on the light, and issues a command at volume. “Get up, you’re going to be late, I’m not doing this again.”

From the kid’s side, the very first human contact of their day is a threat.

Their cortisol is already peaking. And here’s the thing — the prefrontal cortex, that front part of the brain that handles reasoning and cooperating, is the last system to come fully online after sleep. What is online is the emotional part, especially the amygdala — a small almond-shaped structure deep in the brain that runs the alarm system for fear and threat.

So you aim a demand at a kid whose thinking brain isn’t awake yet and whose alarm system is. You get an alarm response. Then you escalate. Then everyone leaves the house angry, and your kid carries that into first period.

There’s a better order of operations. Siegel and Bryson (2014) call it connect and redirect: reach the emotional brain first, then the thinking brain.

Connecting is not giving in. The expectation doesn’t change. You’re just changing the order so the expectation actually lands.

What that looks like

Show up physically before you show up verbally. Sit on the edge of the bed. A hand on the shoulder or back. Ten seconds of just being there.
Open with something that isn’t a demand. “Morning, bud.” “Rough one, huh?” “I know. I hate this part too.”
Name what they’re feeling. “Your body still thinks it’s the middle of the night. That’s real.” Naming a feeling does actual work in the brain — it gives the thinking part a chance to calm the alarm part down (Ong et al., 2014). It also tells your kid you’re on their side about this, which matters enormously to a teenager.
Then redirect — clearly, and without apologizing for it. “Feet on the floor. I’ll get the blinds. Shower’s yours.” The limit didn’t move an inch. You just made it possible to reach.
Use light instead of volume. Open the blinds. Turn on a lamp. Light is what’s actually doing the biological work of waking them — and it doesn’t come with an emotional sting.
Save the hard conversation for later. A chronically late teenager does need a real talk about responsibility and consequences. It should not happen at 6:50 a.m., when neither of you has a working thinking brain. Have it Saturday afternoon.
Watch out for becoming the human snooze button. If waking your kid is a five-round negotiation every single morning, the negotiation itself has become the routine — and your attention is what’s keeping it going. Move to an alarm across the room, agree on the plan during daylight hours, and shrink your role down to one warm check-in.
Protect the last five minutes. Whatever else went sideways, try to end the morning connected — a hug, a “love you, have a good one.” Kids carry the emotional tone of how they left the house for hours.

Part Eight

When it’s more than just summer drift

Most families see real improvement in two to three weeks. Talk to your pediatrician or a sleep specialist if you see any of the following.

Still can’t fall asleep before 1 or 2 a.m. even on a consistent schedule — but sleeps fine when left alone to sleep on their own schedule. That pattern points to delayed sleep-wake phase disorder, a condition where the body clock is stuck significantly later than the schedule life demands. It responds well to properly timed morning bright light plus a low dose of melatonin — but the timing is everything. Melatonin used like a sleeping pill at bedtime is mostly the wrong tool; used as a clock-shifting signal at a low dose several hours before target sleep time, it works completely differently. Do this with a clinician’s guidance, especially with kids.

Snoring, gasping, mouth-breathing, or pauses in breathing during sleep. This can mean sleep apnea — a condition where the airway partly closes during sleep and repeatedly interrupts breathing. In children it often looks like hyperactivity, trouble focusing, and behavior problems rather than sleepiness — and it gets mistaken for ADHD regularly.

Extreme daytime sleepiness even with enough hours of sleep, or suddenly going limp when laughing or startled.

Sleep problems along with ongoing sadness, hopelessness, anxiety, or pulling away from people. Sleep trouble and teen depression feed each other in both directions. When both are present, the sleep problem should be treated alongside the mood — not after it.

Bedtime battles that just aren’t improving even with a consistent routine and clear limits.

The short version

Ten things to remember

Count backward. 2 weeks for elementary, 3 for middle school, 3–4 for high school.
Move the wake-up time first — 15 minutes earlier every 2 nights. Bedtime follows on its own.
Morning light within 30 minutes of waking, every single day. This is the engine.
Dim the house 2 hours before bed. Screens off 1 hour before, charging outside the bedroom.
Bed is for sleep only. Homework at a desk. Reading in a chair.
Same wake-up time 7 days a week. Weekend sleep-in capped at 1 hour.
Hours needed: 9–12 for elementary, 8–10 for teens.
Expect the cortisol surge. They wake up already stressed and usually not hungry. Plan around it instead of fighting it.
Connect, then redirect. Warmth first, limit second — and the limit doesn’t move.
Start now. Every day of head start is 15 minutes you don’t have to force on the first Monday.

Free download

The one-page parent quick reference

Everything above, condensed onto a single printable page: start dates and sleep hours by age, the daily morning and evening rules, the 60-second wake-up script, and the red flags worth a call to your pediatrician. Stick it on the fridge.

Download the Quick Reference Guide PDF • 1 page • Print at home

Keep going

More sleep tools

Sleep Planner Tool → Build a personalized sleep schedule and go deeper into sleep cycles and circadian timing. Kids & Teens Self-Care Skills → Age-appropriate tools for building healthy habits, emotional resilience, and confidence early. All Sleep Articles → Sleep hygiene, circadian rhythms, insomnia recovery, and the science behind better rest.

References

American Academy of Pediatrics. (2014). School start times for adolescents [Policy statement]. American Academy of Pediatrics.

Bootzin, R. R., & Perlis, M. L. (1992). Nonpharmacologic treatments of insomnia. Journal of Clinical Psychiatry, 53(Suppl.), 37–41.

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.). Elsevier.

Chang, A.-M., Aeschbach, D., Duffy, J. F., & Czeisler, C. A. (2015). Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness. Proceedings of the National Academy of Sciences, 112(4), 1232–1237.

Clow, A., Hucklebridge, F., Stalder, T., Evans, P., & Thorn, L. (2010). The cortisol awakening response: More than a measure of HPA axis function. Neuroscience & Biobehavioral Reviews, 35(1), 97–103.

Czeisler, C. A., & Buxton, O. M. (2017). Human circadian timing system and sleep-wake regulation. In M. H. Kryger, T. Roth, & W. C. Dement (Eds.), Principles and practice of sleep medicine (6th ed.). Elsevier.

Drake, C., Roehrs, T., Shambroom, J., & Roth, T. (2013). Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. Journal of Clinical Sleep Medicine, 9(11), 1195–1200.

Eastman, C. I., Stewart, K. T., Mahoney, M. P., Liu, L., & Fogg, L. F. (1994). Dark goggles and bright light improve circadian rhythm adaptation to night-shift work. Sleep, 17(6), 535–543.

Ganio, M. S., Armstrong, L. E., Casa, D. J., McDermott, B. P., Lee, E. C., Yamamoto, L. M., … Lieberman, H. R. (2011). Mild dehydration impairs cognitive performance and mood of men. British Journal of Nutrition, 106(10), 1535–1543.

Haghayegh, S., Khoshnevis, S., Smolensky, M. H., Diller, K. R., & Castriotta, R. J. (2019). Before-bedtime passive body heating by warm shower or bath to improve sleep: A systematic review and meta-analysis. Sleep Medicine Reviews, 46, 124–135.

Hirshkowitz, M., Whiton, K., Albert, S. M., Alessi, C., Bruni, O., DonCarlos, L., … Adams Hillard, P. J. (2015). National Sleep Foundation’s sleep time duration recommendations: Methodology and results summary. Sleep Health, 1(1), 40–43.

Kryger, M. H., Roth, T., & Goldstein, C. A. (Eds.). (2022). Principles and practice of sleep medicine (7th ed.). Elsevier.

Ohayon, M. M., Carskadon, M. A., Guilleminault, C., & Vitiello, M. V. (2004). Meta-analysis of quantitative sleep parameters from childhood to old age in healthy individuals. Sleep, 27(7), 1255–1273.

Ong, J. C., Manber, R., Segal, Z., Xia, Y., Shapiro, S., & Wyatt, J. K. (2014). A randomized controlled trial of mindfulness meditation for chronic insomnia. Sleep, 37(9), 1553–1563.

Owens, J., 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.

Roenneberg, T., Kuehnle, T., Pramstaller, P. P., Ricken, J., Havel, M., Guth, A., & Merrow, M. (2004). A marker for the end of adolescence. Current Biology, 14(24), R1038–R1039.

Siegel, D. J., & Bryson, T. P. (2014). No-drama discipline: The whole-brain way to calm the chaos and nurture your child’s developing mind. Bantam Books.

Smith, M. R., Fogg, L. F., & Eastman, C. I. (2009). Practical interventions to promote circadian adaptation to permanent night shift work. Journal of Biological Rhythms, 24(2), 161–172.

Van Cauter, E., Leproult, R., & Plat, L. (2000). Age-related changes in slow wave sleep and REM sleep and relationship with growth hormone and cortisol levels in healthy men. JAMA, 284(7), 861–868.

Wehrens, S. M. T., Christou, S., Isherwood, C., Middleton, B., Gibbs, M. A., Archer, S. N., Skene, D. J., & Johnston, J. D. (2017). Meal timing regulates the human circadian system. Current Biology, 27(12), 1768–1775.

Wheaton, A. G., Jones, S. E., Cooper, A. C., & Croft, J. B. (2018). Short sleep duration among middle school and high school students — United States, 2015. Morbidity and Mortality Weekly Report, 67(3), 85–90.

The information on this page is designed to offer self-care tips and recommendations based on evidence-based research and literature from professionals in each field. It is not intended to diagnose or treat any specific medical condition. Please consult with your healthcare provider before making any health-related decisions.

Post Disclaimer