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Re:Stepping into math: Open-sourcing our step-by-step solver by khedoros1 on Thursday January 19, 2017 @02:55PM (#13438946)
My early education used sticks and cubes like that. I don't remember different lengths with different colors, but that makes a lot of sense as a way to teach addition.

The 1000-cube fascinated me. I think the classroom only had one of them, so the teacher kept it, and we never really got to use it (and it was hard to gather 10 100-squares to build your own).

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