Rekenrek, Number Rack, Abacus, Math Rack – What’s the fuss?

In math today, it seems like you finally understand what a new math tool is called and then you hear a new name and wonder if it is the same thing or something completely different. Most of you have heard of an abacus; then the other day I saw it called a Ten Bar Demonstration … Continue reading Rekenrek, Number Rack, Abacus, Math Rack – What’s the fuss?