The Ups and Downs of Body Temperature Grades 3-12 One circadian rhythm that is easy to keep track of is your own body temperature. Get an oral thermometer like the one you use when you are sick. Measure your temperature every 2 hours from the time you get up in the morning to the time you go to sleep. Don't eat or drink anything right before you take your temperature. An additional activity to do with the body temperature measurements is to combine the reaction time experiment.
Many schools have classroom pets - a rat, hamster, fish or frog.
If your class has a pet, study its behavior to see if you can determine any cycling patterns. For example, if you have a rat, observe the amount of time it spends eating, walking and sleeping at different times of the day. Check on it every 2 hours and watch it for 10 minute periods. It is best if a group of students helps out. Assign 1 behavior to each student.