Build coin expressions, then exchange them for variable expressions.
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Make a whole rainbow by mixing red, green, and blue light.
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Arrange positive and negative charges in space and view the resulting electric…
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Build an atom out of protons, neutrons, and electrons, and see how the element…
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Explore bending of light between two media with different indices of refraction.
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"The thicker the glass, the darker the brew, the less the light that passes…
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How do you know if a chemical equation is balanced? What can you change to…
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 This app helps to train and understand multiplacation, division and factoring.
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Create your own shapes using colorful blocks and explore the relationship…
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