Countdown to Mystery Class: Three Months to Go!

Days are getting shorter in the Northern Hemisphere as winter approaches. This month, begin to explore the question: What makes seasons?

Mystery Class begins January 28, 2013. Watch for monthly "Countdown to Mystery Class" messages to help you and your students get ready for the challenge.




Image of the Month

Image: The Living Earth®

How Can I Prepare Students? Track Changes in Day Length

Report your November 1st photoperiod:

  • Look up your data for November 1.
  • Report data (select "daylight").
  • View data on photoperiod map.


Report to the Map!

Slideshow: What Makes Seasons?

Observe, Wonder, and Predict
Observe images of the Earth from space. See how sunlight strikes the Earth over the course of a year. Use the slideshow and activities to explore the 12-month cycle of changes.

What Makes Day and Night?
Just for Teachers: Helpful Links
The Next Countdown to Mystery Class will be posted December 1, 2012.