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Sleep
Why we sleep, what happens in the brain and body at night, the body clock and sleep pressure, and how much sleep children and teenagers need. Three ages, each with a text, an experiment, a game, a quiz, a printable worksheet and a teacher sheet.
Ages 6–7Why do we sleep?Every night your body and brain get busy while you sleep. Find out what happens, why we dream, and what helps you sleep well. Then keep a sleep diary.Ages 10–11Sleep: what happens at night?Sleep comes in stages that repeat during the night. Learn what happens in each stage, how your body clock and sleep pressure work, and run an anonymous class sleep survey.Ages 15–16Sleep science: cycles, clocks and the evidenceSleep architecture, the two-process control of sleep (sleep pressure and the circadian clock), what sleep is for, and how to read survey statistics critically. With a correlational investigation of sleep and reaction time.