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,...

Brush up on your math skills relating to proportions then try some practice problems to test your understanding.

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 short exercise gives the student a ratio in reduced terms, and then gives the students a replacement value for one part of the ratio. The student is then to input the other part of the replacement ratio so as to keep the two ratios...

This WebMath site provides a general description of proportions. Content also includes a 'problem solver' which lists step-by-step instructions on how to obtain the correct answer.

Deterime the ratios of amounts to one another and then simplify.

Explore ratios in terms of scales on a map.

A collection of teacher resources to aid in teaching and reviewing ratio and proportion in math. There are worksheets, PowerPoint presentations, activities, and smartboard activities available for the teacher to download.

[Free Registration/Login may be required to access all resource tools.] Learn how to use ratios and proportions to solve problems.

Print or create worksheets or flashcards to assess students' understanding of the constant of proportionality.

Teachers can assess students' knowledge of proportional relationships with these printable worksheets. You can even create your own worksheet or flashcards.

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

Print or create worksheets or flashcards to assess students' understanding of graphs and the significance of x and y in relation to proportionality.

Print or create worksheets or flashcards to assess students' understanding of how to express a proportional relationship as an equation.

Print or create worksheets or flashcards to assess students' understanding of ratio concepts.

Print or create worksheets or flashcards to assess students' understanding of ratios and unit rates.

A student is searching for a solution to a ratio question without using a diagram. Dr. Math helps to break it down both with and without a diagram. An understanding of fractions, multiplication, and basic algebra is necessary to get this...

A comprehensive lesson on algebraic thinking where students create and identify patterns using proportional reasoning. Research based, this lesson includes technology connections, items for discussion, and extension activities.

Test your knowledge of ratios by determining the equivalents and how to interpret the given ratio.

This site introduces students to the definition of golden ratio. It gives them a chance to estimate ratios and predict which figures are closest to the golden ratio. There is a link on this page that provides charts for students to...

Double ratios are investigated in this mathematics resource. Students learn about double ratios through a lesson with examples and assess their understanding with a learning game.

In this instructional activity, learners will explore the concept of similarity. Students will first simplify ratios, solve proportions using the cross product property, and use properties of proportions to solve real-world problems....

Test your knowledge of ratios.

Learn how to use fractions to interpret food labels and make healthy eating choices.