Students can learn science the same way scientists do — watch to see how: http://t.co/miFCAak1q4

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Students can learn science the same way scientists do — watch to see how: http://t.co/fcJTaAPlg5

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Where does the mass come from when a tiny seedling grows into a giant tree?

http://t.co/uJldWgc3Fc

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New ep http://t.co/nn4IbKNJAf Ms. Reyes tackles water & weather... & break dancing.

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