These books explain various maths concepts in story form. They are not a maths curriculum.
A great way for children to learn these concepts apart from a traditional maths program. Suits ages 7-14.

Sir Cumference and the First Round Table $13.00

Covers the concepts of circumference, radius and diameter.

Sir Cumference and the Isle of Immeter $13.00

Covers the concept of the area of a circle.

Sir Cumference and Dragon of Pi $13.00

Explains the derivation of Pi.

Sir Cumference and the Great Knight of Angleland $13.00

Measuring angles.

Sir Cumference and Sword in the Cone $13.00

Covers three dimensional measuring.