Zap Zap Fractions is an iPad and iPhone math app for children that manages to be both instructional and beautiful. When I saw the game demoed by its creators, Malaysia-based Visual Math Studio, at the ...
“Who would draw a picture to divide 2/3 by 3/4?” asked Marina Ratner, a professor emerita of mathematics at the University of California at Berkeley, in a recent Wall Street Journal opinion piece.
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