Practice telling whether or not the relationship between two quantities is proportional by reasoning about equivalent ratios. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...

[Free Registration/Login may be required to access all resource tools.] In this lesson students find a scale, ratio, or proportion given actual and scale dimensions. Students examine guided notes, review guided practice, watch...

Make Texas chili as you learn about ratios in this interactive lesson. Students get immediate feedback on their responses and teachers have access to online assessment.

Learn how to calculate sale price when combining two "percent-off" discounts in this video from KQED. In the accompanying classroom activity, students develop and share a variety of strategies, including modeling with a 10 x 10 grid to...

[Free Registration/Login may be required to access all resource tools.] In this lesson students recognize proportions as a statement of equivalent ratios. Students examine guided notes, review guided practice, watch instructional videos...

[Free Registration/Login may be required to access all resource tools.] In this lesson students write ratios to model real-world scenarios. Students examine guided notes, review guided practice, watch instructional videos and attempt...

[Free Registration/Login may be required to access all resource tools.] In this lesson students write and solve proportions. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

What is a ratio? How can we create equivalent ratios? Students work to express and extend relationships using ratios.

Watch as the National Museum of Mathematics creates an interesting series of images using ratios. This video focuses on the proportional relationship observed in fractals and challenges you to do some critical thinking using ratios and...

In this lesson on ratios, 7th graders explore how ratios can be used to demonstrate rates by exploring proportional relationships.

In this video, Harry finds money on the sidewalk. He uses ratio, proportion, and some knowledge about shadows to return it to the rightful owner. In the accompanying classroom activity, students investigate whether there is a consistent...

You can pick up some valuable ratio pointers here. When you finish working your way through the three instructional pages, go on to the Activity for some practice, or take an online "Test Bite" and check your understanding.

[Free Registration/Login may be required to access all resource tools.] In this lesson students write ratios, order ratios from least to greatest and greatest to least and compare ratio. Students examine guided notes, review guided...

Practice filling out tables of equivalent ratios. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login may be required to access all resource tools.] In this lesson students write ratios in simplest form. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.

[Free Registration/Login may be required to access all resource tools.] In this lesson students simplify ratios by dividing by the greatest common factor. Students examine guided notes, review guided practice, watch instructional videos...

[Free Registration/Login may be required to access all resource tools.] In this lesson students use a proportion to find part a of the percent proportion. Students examine guided notes, review guided practice, watch instructional videos...

Practice solving ratio word problems like, "If Ben reads 10 pages in 15 minutes, how long does it take him to read 40 pages?" Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...

This site contains a lesson about ratios and unit rates as well as guided and independent practice for students to review the skills.

A clear explanation, with drawings and examples, of the golden ratio. The examples demonstrate the beauty of mathematics, such as how two Fibonacci numbers can approximate the golden ratio, and why the golden ratio can be called the...

[Free Registration/Login may be required to access all resource tools.] In this lesson students use the cross products of proportions to find base b in percent problems. Students examine guided notes, review guided practice, watch...

Gain an understanding of percent proportions by taking a look at examples and a video lesson.

Explore word problems about ratios and watch and listen to all the steps needed to solve.

Identify ratios in this learning game with martians.