CK-12 Foundation
Ck 12: Arithmetic: Proportions Using Cross Products
[Free Registration/Login may be required to access all resource tools.] In this lesson students use cross products to solve proportions and find the value of the missing variable. Students examine guided notes, review guided practice,...
CK-12 Foundation
Ck 12: Arithmetic: Proportions Using Cross Products
[Free Registration/Login may be required to access all resource tools.] In this lesson students write proportions and then solve proportions by using cross-products. Students examine guided notes, review guided practice, watch...
Discovery Education
Discovery Education: Web Math: Proportions
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.
Sophia Learning
Sophia: Similarity
This learning tutorial describes the characteristics of similar figures and how to use scale factor and proportions to determine missing side lengths. The lesson includes PowerPoint presentations and videos demonstrating how to solve...
ABCya
Ab Cya: Equal Proportions: Dirt Bike Proportions
Start your engines! This racing game will speed up your math skills by challenging players to find equivalent fractions. The faster you solve the problems the faster the bike goes.
![Augusta Technical College: Solving Percent Problems [Pdf] Unknown Type](http://lessonplanet.com/content/resources/thumbnails/410144/large/bwluav9tywdpy2symdiwmduymc0yoda2mi0xd3dqcnkwlmpwzw.jpg?1589985578 "Augusta Technical College: Solving Percent Problems [Pdf] Unknown Type")
Other
Augusta Technical College: Solving Percent Problems [Pdf]
Study sheet explains how to solve three different percent problems including finding the part, the percent, and the whole.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Solving a Ratio With & Without a Diagram
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...
Texas Instruments
Texas Instruments: Determining Sample Size for a Given Margin of Error
This set contains questions about statistics involving how to choose a sample size to fit a desired maximum error bound. The student learns to do this on confidence intervals for proportions as well as confidence intervals for means.
Math Planet
Math Planet: Algebra 1: Calculating With Percents
Provides examples and a video lesson that illustrates how to solve percent problems.
Texas Instruments
Texas Instruments: Lifting a Lion
In this activity, students learn to solve a real-world problem. Using a toy lion and a lever, students discover how much work is needed to raise the toy lion. They use proportions to determine the force needed to lift a real lion.
CK-12 Foundation
Ck 12: Geometry: Unknown Measures of Similar Figures
[Free Registration/Login may be required to access all resource tools.] Use proportions to find unknown measures in similar figures and then apply these measures to indirect measurement.
Rice University
Rice University: Cynthia Lanius: All About Ratios
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.
CK-12 Foundation
Ck 12: Geometry: Proportionality Relationships Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide looks at proportionality theorems for triangles and parallel lines intersected by transversals.
CK-12 Foundation
Ck 12: Algebra: Linear Equations Study Guide
This comprehensive study guide highlights the main terms and formulas needed to understand linear equations. Examples are included.
Better Lesson
Better Lesson: Introduction to Ratios
What is a ratio? How can we create equivalent ratios? Students work to express and extend relationships using ratios.
Math Drills
Math Drills: Fractions Worksheets
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.
Quia
Ixl Learning: Percents
Brush up on your math skills relating to percents then try some practice problems to test your understanding.
PBS
Pbs: Proportional Scaling
Examine some of the complexities and complications inherent in the development of a micro engine. This video focuses on how MIT researchers have to consider proportions comparing volume and surface area when factoring heat loss, taking...
PBS
Pbs: Recognize and Represent Proportional Relationships Between Quantities: Ratio, Proportion, Cross Multiply, Divide
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...
PBS
Pbs: The Lowdown: The Math of Trash: Percents and Proportions
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...
PBS
Pbs: Human Tree: 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...
Other
Nearpod: Percent of Change
In this instructional activity, 7th graders will learn how to solve percent of change problems.
Other
Nearpod: Similar Figures & Proportionality
In this lesson on similar figures and proportionality, young scholars explore how to identify if figures are similar by applying their knowledge of corresponding angles and sides.
Amby Duncan-Carr
Amby: Proporion Method to Solve Percent Problems
Examples are solved to demonstrate using proportions to solve percent problems. Exercises are provided that allow you to check your answers.