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### Fraction Game

3-5, 6-8

This applet allows students to individually practice working with relationships among fractions and ways of combining fractions.### Histogram Tool

3-5, 6-8, 9-12

This tool can be used to create a histogram for analyzing the
distribution of a data set using data that you enter or using pre‑loaded
data that you select.### IGD: Area of a Parallelogram

3-5, 6-8

This applet will show you how to divide the parallelogram into pieces, arrange them together to form a rectangle, and then use the formula for the area of a rectangle to find the area of the parallelogram.### IGD: Area of a Rectangle

3-5, 6-8

Use this tool to show how the side lengths of a rectangle affect the rectangle's area.### IGD: Area of a Triangle

3-5, 6-8

Use this tool to prove how to find the area of a triangle.### IGD: Dropping a Perpendicular Line

9-12

Use this applet to show how to drop a perpendicular from a point onto a line.### Area of Trapezoids

6-8

Investigate how changes in the base and height of a trapezoid affect its area.### Area of Parallelograms

6-8

This applet shows the relationship between the area of a parallelogram and the lengths of its sides.### Triangle Inequality

6-8, 9-12

This activity illustrates the Triangle Inequality and the conditions necessary for a triangle to be formed from three straight lines.### Triangle Classification

9-12

Use this applet to show how the placement of the third vertex of a triangle affects the classification of that triangle.