Welcome to Mystery Class 2018
January 26, 2018 by Julie Brophy

Can you find the ten secret sites by tracking changes in sunlight?

Students waving
Week #1: The Search Begins

Here's a clue from one of the secret sites:

In fall as blue skies were replaced with grey
and our daylength went astray,
we waved goodbye to the leaves of 2017.
The changing season will soon be seen
and longer days will bring us more green.
So follow the clues, and track the Sun,
do your best to find us, we'll all have fun!


Photoperiod Clues from the Mystery Sites


Mystery Class Photoperiod Map

Compare Your Photoperiod

Report Photoperiod

Mystery Class Photoperiod Map


Journal: Comparing Photoperiods

Look at your local photoperiod data and think about where you are on the globe. Choose data from one of the Mystery Classes to compare to your own.

Journal #1


Explore: Comparing Shadows

Why do shadows change from season to season? How do shadows change at your latitude?

Sun Simulator


Resources for Educators

Next Update February 2, 2018