When young Per visits her uncle Sir Cumference and his family, she learns how to play the game, "Inners and Edges". After she finds a clue linking the game to the mysterious castle on the island of Immeter, she must figure out how to find the perimeter and area of a circle to unlock the island's secret. Math skills taught include finding the area and perimeter of a rectangle and a circle. Introduces an underlying concept of calculus - using straight lines to measure curves.
Reading Level: Grade 2-5

Reuploaded Thanks to tran70