Countdown to Mystery Class: Three Months to Go!

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

Mystery Class begins January 31, 2014
Next Countdown: December 1, 2013




Image of the Month

What makes seasons?
What makes seasons?
Image: The Living Earth®

How Can I Prepare Students? Track Changes in Day Length

Photoperiod is a central clue in Mystery Class. Build skills by reporting your photoperiod each month.

Report Daylight
November 1

Report to the Map!

1. Report for November 1

2. Find your sunrise/sunset: Look-up

3. Calculate your day length (photoperiod).

4. Report your day length: Select "Daylight"

Mystery Class Photoperiod Map Photoperiod Map: Dates to Report Photoperiod Map: Guiding Questions
Map Dates to Report Guiding Questions
for Map Analysis
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
Mystery Class Participation Guide Mystery Class Participation Guide Mystery Class Participation Guide
How to Particpate
Teacher's Guide
Photoperiod Clues
Planning Packet #1
Time Clues
Planning Packet #2
Next Countdown December 1, 2013