Can you find the ten secret sites by tracking changes in sunlight? This is the first weekly update of the season. Watch for news and clues every Monday.

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

There are ten Mystery Classes all waiting to be found.
The shadows of our class are shown on the ground.
Long shadows on our sundial and it's just before noon.
But the changing of seasons brings us short shadows soon.
So first track the sun and then follow the clues.
Take the challenge to find us. You've got nothing to lose.

Photoperiod Clues from the Mystery Sites

• Clues for Monday, January 28
• Record and Graph

Compare Your Photoperiod

• Look up your sunrise/sunset data for January 28.
• Record and Graph
• Guiding Questions

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 Page for Week #1
• About Mystery Class Journals

Resources for Educators

• Need Modifications? Contact Us
• Participation Guide