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
• Slideshow: Track Seasonal Change

Earth's Daily Cycle

• Slideshow: What Makes Day and Night?
• Activity: Follow the Sun for a Day
• Activity: World Clocks
• Activity: Time Zones

Earth's Annual Cycle

• Model: Earth's Annual Cycle
• 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
• Photoperiod Graph: Reflection Questions
• 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

Additional Resources

• Core Teaching Resources
• Assessement Tools
• Archived materials

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