Mangahigh
Mangahigh: Number: Recognize Proportions
Test your knowledge of proportions and how they relate to parts of a whole.
Texas Instruments
Texas Instruments: Similar Triangles and Proportions
In this activity, students will investigate the relationship among the similar triangles formed when a segment is constructed parallel to one side of a triangle. They will explore the various ratios that exist between the lengths of the...
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Unit Rates
An interactive simulation that teaches about ratios, proportional reasoning, and using double number lines to look for patterns through interactions while shopping for fruits, vegetables, and candy and by comparing cars with different...
Math Slice
Math Slice: Ratios and Proportions: Math Worksheets
This tool allows you to create worksheets of word problems involving ratio and proportion.
Quia
Quia: Ratios and Proportions
A series of questions about ratios and proportions is presented in a millionaire game format.
Quia
Quia: Rates, Ratios, and Proportions
One or two players can play a learning game that reviews rates, ratios, and proportions.
ClassFlow
Class Flow: Ratio
[Free Registration/Login Required] In this flipchart, students apply their understanding of ratio, percent, and direct proportion in various situations. Students solve problems involving ratio and proportion with similar figures and with...
ClassFlow
Class Flow: Introduction to Ratio and Proportions
[Free Registration/Login Required] This flipchart introduces the concept of ratios and proportions using a variety of visuals and manipulatives.
National Council of Teachers of Mathematics
The Math Forum: Ratios and Fractions
A seventh-grade student is having trouble understanding ratios, fractions, and simplest form. Dr. Math to the rescue! Real-world, easy to grasp examples.
Purple Math
Purplemath: Proportions: Introduction
Explains the basics and terminology of proportions.
Ducksters
Ducksters: Kids Math: Ratios, Fractions, and Percentages
This page explores how ratios can be written as fractions. The site also discusses proportions and reducing ratios with problems and examples.
ClassFlow
Class Flow: Solving Proportions
[Free Registration/Login Required] This lesson introduces the cross product method for solving proportions. It also connects the mathematical content to real-world applications.
National Council of Teachers of Mathematics
The Math Forum: Means Proportional and Geometric Means
Dr. Math helps a student discover the meaning of the mean proportional of two numbers. Detailed explanation with examples.
![Houghton Mifflin Harcourt: Saxon Activity Center: Graphing Calculator Activity: Proportions [Pdf] Unknown Type](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Houghton Mifflin Harcourt: Saxon Activity Center: Graphing Calculator Activity: Proportions [Pdf] Unknown Type")
Houghton Mifflin Harcourt
Houghton Mifflin Harcourt: Saxon Activity Center: Graphing Calculator Activity: Proportions [Pdf]
A concise graphing calculator lesson on proportions. Detailed examples, demonstrations of functions, and practice problems included. Acrobat Reader required.
University of Texas
Inside Mathematics: Truffles [Pdf]
This task challenges a student to demonstrate understanding of ratios and proportions. Students must determine a generalized rule from an understanding of ratio and proportional reasoning in a given real-world context.
OER Commons
Oer Commons: Multiplication Properties of Equality
Seventh graders use the multiplication property of equality to justify their solution to a ratio problem.
Common Core Sheets
Common Core Sheets: Ratios and Proportional Relationships 7.rp.1 Worksheets
Create a worksheet to assess students understanding of unit rates and unit fractions.
Shmoop University
Shmoop: Ratios & Percentages: Ratios & Proportions
Students learn about ratios and percentages in the tutorial. The mathematics resource consists of examples and practice problems with answers.
Sophia Learning
Sophia: Equivalent Ratios: Lesson 5
This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 5 of 8 in the series titled "Equivalent Ratios."
Sophia Learning
Sophia: Equivalent Ratios: Lesson 8
This lesson will introduce the means and extremes of a proportion, and demonstrate how to use cross multiplication to determine if two ratios are equivalent. It is 8 of 8 in the series titled "Equivalent Ratios."
Shmoop University
Shmoop: Ratios & Percentages: Solving Proportions
Students learn how to solve proportions. The mathematics resource consists of examples and practice problems with answers.
Free Math Help
Free Math Help: Proportions and Ratios
The tutorial investigates proportions and ratios. The lesson includes explanations on solving problems with ratios using cross multiplication.
CK-12 Foundation
Ck 12: Measurement: Scale Distances or Dimensions
[Free Registration/Login may be required to access all resource tools.] Recognize unit scale as a ratio between units of measure of scale dimension to actual dimension.
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