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Screenshot of How the Metre Became the Metre
How the Metre Became the Metre
Screenshot of How they found the World’s Biggest Prime Number
How they found the World’s Biggest Prime Number
Screenshot of How thick is a three-sided coin?
How thick is a three-sided coin?
Screenshot of How to calculate at lightning speed
How to calculate at lightning speed
Screenshot of How to count to a hundred
How to count to a hundred
Screenshot of How to Divide by 7
How to Divide by 7
Screenshot of How to draw an egg!
How to draw an egg!
Screenshot of How to Draw Spirals
How to Draw Spirals
Screenshot of How to make a fold-and-cut bat for Halloween!
How to make a fold-and-cut bat for Halloween!
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