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Tag: Eratosthenes

Learning Critical Thinking Through Astronomy, Week 7

The week began with my expectation that students had watched a YouTube clip showing an excerpt from Carl Sagan’s COSMOS series in which Sagan explains Eratosthenes’ work with shadows. Students don’t realize it yet, but this topic is the culmination of all of the previous activities. It’s the reason for the critical thinking activities. It’s […]

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