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Discovering Photoperiod Clues
Teacher's Planning Packet #1
Packet #1 | Packet #2

During the spring Mystery Class season, the weekly photoperiod data your students receive will slowly reveal information about the latitude of the 10 Mystery site locations.

Teacher Practice Packet #1 includes the actual, start-to-finish sunrise/sunset data from a prior Mystery Class season. This practice packet will help you discover for yourself the relationships between latitude, sunlight, and seasonal change when you:

  • Practice calculating photoperiod.
  • Plot the data on a graph.
  • Examine the data to find patterns and surprises.
  • Make predictions and compare findings.
  • Reflect in your Mystery Class journal.

We hope the practice packet will give you a chance to experience the process of discovery your students will have when they begin to collect, organize, and analyze data to identify the locations of this year’s mystery classes.


Teacher Practice Packet #1: Exploring Latitude Clues
Packet #1

A 10-page printer-friendly packet.



Essential Question

What can seasonal changes in sunlight reveal about a location's latitude?



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