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Countdown to Mystery Class
Monthly: Sept.1, Oct.1, Nov.1, Dec. 1, Jan.1
Each "Countdown" will help you get ready for the spring 2012 Mystery Class project.
Rotation of the Earth

January, 2012: One Month to Go!
Mystery Class begins January 30th! Get ready this month by writing riddles about key words and concepts. Also, continue practicing daylength calculations and report your photoperiod for January 1st.
Image: John Walker, Fourmilab

Eartha

December, 2011: Two Months to Go!
The globe is a model of Earth. Each part gives information about our planet. Build sleuthing skills by looking at the globe with the eyes of a detective: What features are related to time and seasonal change? Image: American Road

Photoperiod Map

November, 2011: Three Months to Go!
This month, capture students' questions about time, sunlight, and the seasons on Wonder Rings. Help students create a classroom learning center filled with kid-tested, teacher-approved books. Dive into reading and discover how authors explain the reasons for seasons.

Season simulator

October, 2011: Four Months to Go!
Autumn began in the Northern Hemisphere last week. It's a great time to explore the relationship between sunlight and seasonal change as you "countdown" the months before Mystery Class begins in January.

Sunlight and the Seasons: Map of Day Length around the Globe

September, 2011: Five Months to Go!
As you "countdown" the months before Mystery Class begins in January, track changes in daylight as the Earth revolves around the Sun. Share and compare observations with people around the globe. Report to the live photoperiod map!

Mystery Class Updates: Spring 2012
Spring Updates (Weekly): Jan. 30, Feb. 3, 10, 17, 24, Mar. 2, 9, 16, 23, 30, Apr. 6, 13, 20, 27, May 4, 11, 2012
Earth from space Welcome and Orientation
Once Mystery Class begins on January 30, weekly news will be posted on this page every Friday from February to May. (See schedule above.) We'll challenge you to find ten Mystery Class sites using sunrise and sunset times and other "clues" as your guide!. Learn more about this global game of hide-and-seek.
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