Chapter 9 is about the science of sleep and how sleep is tied to learning. Take a peek:

“SO HOW MUCH SLEEP DO WE NEED?

5-12 year olds need 10-11 hours of sleep.
12-18 year olds need 8.5-10 hours of sleep.
Adults need 7.5-9 hours of sleep.

I must admit, the poor sleep habit is a hard one to change. I struggle with it myself.

Just remember this:

1. A tired brain is full of toxins that mess with your ability to think clearly and be productive.
2. These toxins are also tied to dementia and Alzheimer’s.
3. Number 1 and 2 above really suck.”