When I consider a replica of the solar system with my fifth graders I immediately think of relative distances between planets. Usually by fifth grade they have made the traditional models with the planets in perfect orbits right next to each other. This, however, is a big misconception. There are multiple activities available, from using toilet paper to measurements outside to model the distanc...

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This is a really neat idea. Thank you for sharing it!

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I got this idea from a friend and master science teacher: she had a chair in her classroom labeled Pluto. When a student could not participate in an activity due to behavior, he or she was sent to Pluto. As we know, at best it is far far out in the coldest regions of the solar system. At worst it is now a minor planet. I find that my students police themselves well. People causing disruption...

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