2 books in series

Math is CATegorical

Math is CATegorical is a 2-book series with 2 primary works first released in 2006 with contributions by Brian P. Cleary.

The Action of Subtraction

Math is CATegorical

2006 • 3 Readers • 32 pages • 4.5

How Long or How Wide?: A Measuring Guide

Math is CATegorical

2007 • 1 Reader • 32 pages