Mathematics 4

# Lesson 1 - Standard Area Units

To encourage students to have fun on the Web while learning about Standard Area Units, here are some games and interactive activities they can do on their own or in pairs.

### Goal

Explain why we use standard units to measure area.

### Builds Upon

Student Book pages 212-213

### Instructions for Use

Geoboard prompts students to investigate different units to measure area.

To use Geoboard, select a circle by holding the mouse button down, and drag it to any location on the gird. Release the circle to anchor it. A red node appears at the top of the circle.

Click on any part of the circle and drag it in any direction. It will stretch much like a rubber band. Secure the band to any points on the grid. You can make squares, triangles, rectangles and many other geometrical shapes.

Click on the circle again to add as many bands as you like. To color the area in the shape, click first on the shape and then on the color buttons to the right. To release a node, hold the Ctrl key down and click on the node.