In these KQED Lowdown infographics, explore how adult obesity rates in the United States, as measured by body mass index (BMI), have dramatically changed in the past half-century. A circular graph and a pictograph depict data by decade,...

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

This tutorial provides definitions and examples of ratios and proportions and features comparing ratios and converting rates.

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...

Discover how percents and proportions help explain issues like climate change, composting, and zero waste in this video from KQED. In the accompanying classroom activity, students estimate the percentage of various types of trash that...

This tool allows you to create worksheets of word problems involving ratio and proportion.

In this lesson, students create a class mural by using scale, ratio, and proportion. Media resources and teacher materials are included.

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

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...

A comprehensive guide for learning all about proportions with definitions, proportion formulas, types of proportions, properties of proportions, the difference between ratio and proportion, solved examples, and practice questions.

The Saskatoon Board of Education provides teachers with this collection of grade six math performance stations. Although several of the stations have been designed as assessment tools for the Saskatchewan curriculum, teachers may also...

The Saskatoon Board of Education provides teachers with this collection of grade seven math performance stations. Although several of the stations have been designed as assessment tools for the Saskatchewan curriculum, teachers may also...

The Saskatoon Board of Education provides teachers with this collection of grade eight math performance stations. Although several of the stations have been designed as assessment tools for the Saskatchewan curriculum, teachers may also...

The Saskatoon Board of Education provides teachers with this collection of grade nine math performance stations. Although several of the stations have been designed as assessment tools for the Saskatchewan curriculum, teachers may also...

At the end of this lesson about ratio/proportion, students will be able to recognize and apply ratios and proportions to solve real-life problems and solve for any unknown component.

In this Cyberchase media gallery, learn about ratio and proportion and how to use an algebraic shortcut to solve proportion problems. In the accompanying classroom activity, students play a game called the "Pom-Pom Nose Push," in which...

Download and print these worksheets to sharpen your skills working with fractions. Worksheets focus on modeling fractions, ratios and proportions, comparing, ordering, simplifying, converting, and order of operations.

Seventh graders use ratio cards to find equivalencies and form partnerships for the week. As a class, 7th graders discuss and decide on classroom norms. Give each student a ratio card. Instruct students to find a classmate whose card has...

This lesson explains proportions along with the formula to determine if the ratios are equal. An interactive practice activity is included.

Demonstrate the ability to apply the use of decimals, fractions, ratios and proportions to situations based upon given information about planets in the solar system.

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...

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.

The triathlon is a physically gruelling challenge. Can you work out which athlete burnt the most calories? This activity provides a real-life context for working with proportionality, speed, rates, and units of measurement and is aimed...

Using the USA TODAY Infograph, 'Wing tabs save fuel', ratios and proportions will be used to explore the concept of similarity between a drawing/model and the actual dimensions. The effects of dilation (size change) on an image and...