Join Sir Cumference, Lady Di of Ameter, and their son Radius for wordplay, puns, and problem solving in these geometry-packed math adventures. King Arthur was a good ruler, but now he needs a good ruler. Sir Cumference is a great teaching tool for students. It introduces circumference, radius, diameter, octagons, ovals Memoria Press product: https://www.memoriapress.com/curriculum/special-needs/levels-9-10-arithmetic-read-aloud-set/