The Body's Clock and Sleep

Your body has a clock inside it, and it tells you when to sleep.

This clock lives in your brain and works with the light around you.

In the morning, bright light tells your clock to wake up.

Then your body makes a chemical called melatonin at night.

Melatonin helps you feel sleepy and ready for bed.

If you look at a phone in the dark, your clock gets confused.

It thinks the day is not over yet.

So you stay awake longer, and your sleep is not deep.

People who sleep well have more energy for school and play.

Try to go to bed at the same time every night.

Your body will thank you with a happy, healthy day.