Mathematics 4

# Lesson 4 - Arrays for Fact Families

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

### Goal

Describe arrays using fact families.

### Builds Upon

Student Book pages 154-155

### Instructions for Use

Arrays on a Grid allows students to visually plot arrays on a grid.

To use Arrays on a Grid, input a number between 0 and 50 in the text field ' Use this #' button, and click the button. Enter the factors of the number in the text box - expressed as a product - for example: 1* 6 for 1 X 6. Click on the ' Enter' button. Use the ' Hint ' button to help determine how many more factors there are left. When all the expressions are entered, select one by clicking on it. The expression will be highlighted with gray and will be shown above the grid. Click and drag across the grid to color a rectangle with the dimensions of the expression. To check the answer, click the 'Check' button.