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Wed Sep 3, 2014, 04:00 PM

On the first day Primary School Science Teacher Kelly Hoffmaster wanted to get her students thinking

These are the problems she asked her 3rd and 5th grade students to solve.

3rd Grade: The Marshmallow Challenge

Sink a Mini Marshmallow in a Cup of Water
Materials: mini marshmallow, water, cup—that’s it!

5th Grade: The Index Card Challenge

Fit Your Body Through an Index Card
Materials: One 3 x 5” index card and a pair of scissors


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