Sir Cumference is a series of children’s educational books about math, by Cindy Neuschwander and Wayne Geehan. The books have been studied for their use in mathematics education.
Sir Cumference And The First Round Table : Assisted by his knight, Sir Cumference, and using ideas offered by his wife and son, King Arthur finds the perfect shape for his table.
Sir Cumference and the Sword in the Cone
Sir Cumference and the Great Knight of Angleland
Sir Cumference and the Isle of Immeter
Sir Cumference and the Dragon of Pi
Sir Cumference and the Roundabout Battle
Sir Cumference and the Off-the-Charts Dessert