BBC
Bbc: Sleep: Daily Rhythm Test
Answer these four questions about your sleep habits, then see a graphic representation of your natural circadian rhythm of alertness and sleepiness over a 24 hour period.
Read Works
Read Works: Night Owl
[Free Registration/Login Required] A literary text about a boy named Jamal who listens to many sounds when he stays up late at night. A question sheet is available to help students build skills in reading comprehension.