Browsing All posts tagged under »subitize«

The good connections

March 16, 2017

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Formulae are abstract.   Substitution into a formula can be a meaningless machination.  No longer, for the student who explained what we’d have to do to find the missing length knowing perimeter and side of a rectangle… double the width and subtract it from the perimeter.   Well…. I showed him the substitution process and […]