Students work together to build a simple gear train. They record their observations as it gains speed and how the gears rotate. They develop rules about gears based on these observations.

Mangahigh is a website with math games aimed at twelve to eighteen year olds. On this site students form and use the formula for direct variation.

[Free Registration/Login may be required to access all resource tools.] Understand direct and inverse variation.

[Free Registration/Login may be required to access all resource tools.] Students will write, graph, and solve direct variation models for real-world problems. Students examine guided notes, review guided practice, study vocabulary, watch...

Here is a site that clearly and thoroughly explains direct and inverse variation. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to students who have been...

[Free Registration/Login may be required to access all resource tools.] Graph, write, and solve inverse variations.

In Spanish. In this unit you will practice proportion. You will be able to distinguish whether quantities are or not in proportion and solve problems of direct and indirect proportion.