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Welcome to the Mystery Class Seasons Challenge! Can you find the ten secret locations by tracking weekly changes in sunlight? The search begins. . .
How to Participate
Mystery Class Photoperiod Map
Reasons for Seasons: Model
Students in Seasons Challenge

Mystery Class is a global game of hide-and-seek. Follow photoperiod clues to search for ten secret sites around the world. Track sunlight to solve a mystery—and discover the reasons for seasons along the way.


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