Planning
- About: Mystery Class
- Guide: How to Participate
- Planning Packet #1: Photoperiod Clues
- Planning Packet #2: Time Clues
- Activity: Journal Pages
- Standards: STEM, NGSS and Common Core
- Video Overview: About Mystery Class
- Advice: Tips from Teachers
Getting Started
- Activity: Report Changes in Day Length
- Activity: Explore Season Simulator
- Activity: Time, Seasons and the Globe
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Slideshow: Track Seasonal Change
Image: The Living Earth
Earth's Daily Cycle
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Slideshow: What Makes Day and Night?
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Activity: Follow the Sun for a Day
- Activity: World Clocks
- Activity: Time Zones
Image: The Living Earth
- Model: Earth's Annual Cycle
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Slideshow: What Makes Seasons?
- Activity: Season Simulator
- Book: On the Same Day of March
- Mini-unit: Reasons for Seasons
Photoperiod
- Planning Packet: Photoperiod Clues
- Photoperiod Graph: Make Your Own
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Photoperiod Graph: Reflection Questions
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Calculating Photoperiod: Sample Strategies
Time
- Planning Packet: Time Clues
- Activities: Exploring Universal Time
- Photo Gallery: World Clocks and Diagrams
Latitude and Longitude
- Activity: Locate the Spot
- Activity: Where in the World?
- Activity: Latitude Shoes
- Books: Longitude and Literature
- Activity: Sunrise on Equinox and Solstice
- Teacher Background: About Longitude Clues
Research Tools
- Activity: Wonder Rings
- Activity: Explore Words and Diagrams
- Activity: Build-a-Booklist
- Glossary
Image: Carol Cullar
Additional Resources