An animated guide in which fractions multiply to make baby fractions and a rather violent fraction divides numbers with a chainsaw. Use to illustrate the processes of multiplying fractions ...

Being that my daughter is in fifth grade, she’s sort of an expert on what 5th grade girls would want for the holidays. So I put her to work on making this gift guide. This post contains affiliate ...

This file provides functions and modules that construct shapes from a list of cross sections. In the case of skin() you specify each cross sectional shape yourself, and the number of points can vary.