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Lesson Plan
Curated OER

Effects of Changing Dimensions Proportionally

For Teachers 10th
In this geometry worksheet, 10th graders examine the effect of changing the dimensions of a figure proportionally on the perimeter, circumference, and area.  The one page worksheet contains six problems.  Answers are  included. 
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Lesson Plan
Curated OER

Robot Ratios

For Teachers 8th - 10th
Students measure the activity and parts of a robot. In this algebra lesson, students explore ratio and proportion using their classroom. They apply properties of fractions as they cross multiply to solve problems.
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Lesson Plan
Curated OER

Scale Drawing

For Teachers 9th - 10th
Students use ratio and proportions to solve problems. In this geometry instructional activity, students apply ratio and proportions to real life scenarios.
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Lesson Plan
Curated OER

Get Geared Up

For Teachers 9th - 11th
Middle schoolers calculate gear ratio as they solve word problems. They discuss and find slopes as they relate to real life. Additionally, they hey use ratio and proportion to make predictions and solve problems.
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Lesson Plan
Virginia Department of Education

Similar Solids and Proportional Reasoning

For Teachers 9th - 11th
Double the dimensions, quadruple the surface area. Pairs build similar prisms and compare the ratios of their surface areas and volumes to the ratio of the heights. Given two similar cones, partners determine the ratios of the lateral...
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Lesson Plan
Illustrative Mathematics

Two-School Dance

For Teachers 7th - 9th Standards
Who's ready for the dance? When two middle schools combine for a dance, your learners' job is to calculate the ratio of girls attending. Provided with three different solutions, you can choose from setting up a ratio, linear equation, or...
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Lesson Plan
Illustrative Mathematics

Buying Bananas, Assessment Version

For Teachers 7th - 9th Standards
Practice with unit rates, proportions, and ratios when Carlos purchases an amount of bananas. Learners must interpret a graph to decide whether points on the same line represent similar proportional relationships. Use with lesson plans...
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Lesson Plan
Curated OER

Comparing Ratios

For Teachers 7th - 10th
Students solve problems using ratio and proportion. In this math comparison lesson plan, students identify methods used to solve and compare ratio and proportion in the real world. They apply criss cross multiplying to solve their problems.
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Worksheet
Helping with Math

Ratio and Proportion: Simplifying Ratios (1 of 2)

For Students 5th - 10th Standards
Here is a set of 24 pairs of numbers for which kids reduce the ratios to their simplest form. It is a simple and straightforward assignment, meant by the publisher to address CCSS.Math.Content.6.RP.3. Note, however, that it only requires...
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Worksheet
Curated OER

Solving for Missing Proportions

For Students 5th - 10th
In this missing proportions worksheet, students solve for the variables that appear in the proportions with one, two, and three digit numbers. Students complete 10 problems total.
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Worksheet
Kuta Software

Proportions

For Students 6th - 9th
In this pre-algebra worksheet, students check 6 pairs of ratios to determine if they are equivalent. In the final 16 problems, students solve for the missing value in the equivalent proportions.
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Lesson Plan
Curated OER

Using Proportions to Estimate

For Teachers 8th - 10th
Students calculate ratio and proportion. In this unit rates lesson, students estimate using proportions and find their errors in doing so. They calculate unit rates and define the concept of unit rates.
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Worksheet
Curated OER

Math Regents Exam Questions: Verbal Problems Involving Ratio

For Students 9th - 12th
In this ratios instructional activity, students solve 6 multiple choice and short answer word problems.  Students use ratios of boys to girls and deer to foxes to find the number of boys, girls, deer, and foxes in a given population.
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Worksheet
Curated OER

Math Regents Exam Questions: Proportions

For Students 8th - 10th
In this proportions activity, students solve 1 multiple choice question.  Students determine the amount of milk needed to keep a cake recipe proportional.
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Lesson Plan
Curated OER

Daily Time Ratios

For Teachers 7th - 9th
Students track and record how much time they spend on each activity. In this spreadsheet lesson, students apply different functions using Microsoft excel to format cells and calculate the sum of their total time spent each day. They...
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Worksheet
Curated OER

Ratio of Similarity

For Students 10th
In this ratio of similarity worksheet, 10th graders solve and complete 20 different problems that include defining the ratio of similarity in various figures. First, they determine the ratio of similarity for large and small pairs of...
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Lesson Plan
Curated OER

Proportionality, Ratios and Constant Variation

For Teachers 9th - 11th
Students use Scion Image to estimate the proportion of space images. In this proportion lesson, students investigate the online site of Image of the Orbitor and relate the dimensions and sizes to known sizes.
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Lesson Plan
Curated OER

Quilting with Middle School Students: Using Proportionality to Develop Quilt Designs

For Teachers 7th - 9th
Students use quilt patterns to illustrate ratios. In this fractions activity, students color quilt patterns using given fractions and ratios of colors. A finished "quilt" is assembled from the work of the students. This is an...
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Worksheet
Curated OER

Solving Proportions

For Students 9th
In this solving proportions worksheet, 9th graders solve and complete 16 different equations that include using proportions. First, they define a proportion and begin by eliminating the fractions in each. Then, students multiply both...
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Worksheet
Curated OER

Rates and Ratios

For Students 7th - 9th
In this rates and ratio worksheet, students determine the ratio for a given situation. They use proportions to solve problems. This two-page worksheet contains 4 multi-step problems. Answers are provided on the last page.
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Worksheet
Curated OER

Simplifying Ratios

For Students 10th
In this simplifying ratios worksheet, 10th graders solve and complete 24 various types of problems. First, they complete each ratio and reduce when necessary. Then, students find the length and width of each rectangle described. They...
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Lesson Plan
Curated OER

Similar Triangles and Proportions

For Teachers 9th - 12th Standards
Pupils investigate similar triangles and proportions as they make conjectures about the length of sides of similar triangles. For this lesson, have your class construct similar triangles using Cabri Jr so that they share a common vertex.
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Lesson Plan
Curated OER

Solving Problems and Proportions

For Teachers 7th - 10th
In this proportion worksheet, students read story problems, identify the ratios, set them equal to each other, and solve the proportion. There are 11 story problems in this two-page worksheet.
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Worksheet
Curated OER

Using Proportions

For Students 8th - 12th
In this similarities worksheet, students set up ratios and solve proportions using algebra. All of the equations turn out to be linear with no quadratics to solve. There are 20 questions.  

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