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In this Sir Cumference story, Sir Cumference and the Isle of Immeter, young Per visits her uncle Sir Cumference and his family, and 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.

Thanks to Debbie, Wende, and Miriam for creating the Sir Cumference unit studies and printables.

### Sir Cumference and the Isle of Immeter Unit Study Lessons

Here are a few of the lessons you will find in this Sir Cumference and the Isle of Immeter unit study:

Perimeter
Perimeter is the length around any shape. In the game Inners and Edges, the edges were the perimeter. You find perimeter of a straight-sided shape by adding up the length of each side. To remember what perimeter is just think of it as measuring the “rim.” The word rim is in the word perimeter.

Area
Area is the amount of space inside a shape. In the game Inners and Edges, the inners referred to the area. You can find the area of a rectangle by multiplying its length and its width.

Area of a Circle
The instructions for finding the area of a circle are on page 17. There is also more information on page 32. Basically the area of a circle can be found without pi by multiplying ½ the circumference to the radius. (This lesson includes an activity and diagrams, too.)

To access all of the lessons in this Sir Cumference and the Isle of Immeter unit study, grab an easy-to-print file at the end of this post.

### How to Get Started with the Sir Cumference and the Isle of Immeter Unit Study

Follow these simple instructions to get started with the Sir Cumference and the Isle of Immeter unit study.

1. Buy a copy of the book, Sir Cumference and the Isle of Immeter, or grab one from your local library.
2. Print the Sir Cumference and the Isle of Immeter unit study.
3. Choose the lessons you want to use with your student (a highlighter works great for this).
4. Choose and prepare the printables you want to use with your student.
5. Enjoy a week of learning math through literature.

Simply click on the image below to grab your free Sir Cumference and the Isle of Immeter unit study.

### Sir Cumference General Lessons

The unit study writers created a set of general lessons to go with all of the Sir Cumference books. These will help you create a more balanced unit, if you want to incorporate other subjects such as social studies.

You can grab these lessons by clicking on the image below.

Note: These do NOT include the Sir Cumference and the Isle of Immeter unit study.

### More Sir Cumference Math Resources

We have five unit studies based on the Sir Cumference books. Be sure to check out the other four: