Mystery Class is a global game of hide-and-seek. Track seasonal changes in sunlight to find ten secret sites around the world.
Introducing the Mystery Classes of 2015! Meet your new friends from around the globe and celebrate your achievements.
May 1, 2015
Today's the big day! Discover where the 10 sites have been hiding. Next week you'll meet your new friends at each site.
Elizabeth Howard
April 24, 2015
Today is the final day to submit your answers. On May 1st, the secret sites will be revealed. On May 8th, the Mystery Classes will introduce themselves with letters, pictures, and more.
NASA (Julie Palm Crest Elem.)
April 17, 2015
Just one week left to submit your answers! What did you discover about sunlight and seasonal change in your search?
WikimediaCommons: DHershman;J.Paulson;Alexanderg;acs; DIMSFIKA;NSF
The final clues are here! It's time to find the secret locations and submit your answers.
Looking for Clues? The third set of Continent, Country, and City clues is here to narrow the search even further. Final clues are next week.
March 27, 2015
Hungry for Clues? The second set of Continent, Country, and City clues is here.
Build upon last week's clues to narrow your search.
Wikimedia Commons/Silar
March 20, 2015
It's time for the first set of Continent, Country, and City clues. Week by week, they'll reveal fun facts to help you narrow your search.
Wikicommons/A. Westmoreland
March 13, 2015
Time Clues are here! Use equinox sunrise times to estimate longitude of the Mystery sites. Rap up latitude and longitude with this music video.
Mrs. Rountree, Garden Ridge Elem.
The Vernal Equinox is coming! Only on that day, locations at the same longitude experience sunrise at the same time. Explore this unique connection to be ready for next week's Time Clues.
February 27, 2015
Looking for Clues? It's time to zero in on the line that divides the globe into Eastern and Western Hemispheres.
©Stamp Design Royal Mail Group Ltd (1984)
February 20, 2015
Time to wake up? Clocks around the world are set at different times. This week, explore time zones to get ready for special clues coming in March.
Alfonsopazphoto/Wikimedia Commons
February 13, 2015
Where am I? With three weeks of data, can you tell which Mystery Class sites are north and south of your hometown?
Wikipedia
What am I? What will this week's second set of photoperiod clues reveal about the mystery sites?
Welcome to the Mystery Class Seasons Challenge! Can you find the ten secret locations by tracking weekly changes in sunlight?
Explore previous seasons:
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