Curated OER
Using Ratio to Express a Rate
In this Algebra I learning exercise, 9th graders use a ratio to express a rate. The one page learning exercise contains two multiple choice questions. Solutions are provided.
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Mean Twisters - Mean Proportional
For this mean proportional worksheet, students work in pairs to solve right triangle problems. They use ratios and proportions of similar triangles to determine a missing length. This two-page worksheet contains 16 problems.
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Science Fair Space
Students determine the most equitable way to share space and cost between three schools for a fictional science fair. Given a diagram, a word problem, and a data set, students analyze and explain the best way for all schools to share...
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Rates And Unit Price
For this rates and unit price worksheet, students problem solve and calculate the answers to ten word problems and mathematical equations dealing with ratios, proportion and missing values.
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Similarity
Students find the factor of proportionality in similar polygons. In this similarity of polygons lesson plan, students measure the sides and angles of polygons and derive a factor of proportionality between corresponding pairs of sides...
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Basic Skills: Unit Rates
In this unit rates worksheet, students determine the unit rate of given data. This three-page worksheet contains 20 problems. Answers are provided on the last page of the worksheet.
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Angular Size and Similar Triangles
In this angular size and similar triangles worksheet, students use the properties of similar triangles and the ratios of sides to solve for unknowns in given diagrams.
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What Are the Odds?
Middle schoolers identify and interpret various ways of expressing probability as a decimal, fraction, percent, or ratio. They solve problems based on probability as they apply to real world applications.
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Scale Drawing: Perimeter and Area of a Room
Using a scale drawing with some dimensions missing, aspiring do-it-yourself homeowners calculate the remaining sides of a compound-shaped room. They apply the principles of ratio and proportion to determine how much crown molding will be...
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Scale Drawing: Insulating an Attic
Have your aspiring contractors compute the length of two walls in a compound-shaped attic when given a scale drawing of it and the other dimensions. They find the area, determine the number of rolls of insulation they will need to...
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Scale Drawing: Insulating Another Attic
Give your future household repair specialists a real-life chance to apply the concepts of ratio and proportion. Using a scale drawing, they calculate the missing dimensions of two walls of a compound-shaped attic. They then figure how...
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Something Fishy (Statistics)
Learners are introduced to a problem involving an environmental issue. They are introduced to the capture-recapture method which involves capturing fish, tagging them, returning them and recapturing another sample. Pupils work in...
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Measurement of Objects Using Similar Triangles in The Plane
Young scholars use similar triangles and a sight tool to find the height and distance between large objects. In this similar triangles lesson plan, students use a constructed sight tool to measure the distance and height of an object...
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Similarity
Eighth graders understand that proportional enlargement of shapes doesn't change the angles of those shapes. In this similarity lesson, 8th graders complete exercises to create enlargements of shapes and understand similar shapes.
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Comparing Candy Bars
Eighth graders identify that a ratio is a comparison of two numbers and that a proportion is an equation that equates two ratios. They identify the extremes and means of proportions, as well as the product of the extremes equals the...
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Proportional Division
In this proportional division instructional activity, students read through an example and complete 5 practice problems using proportional division. Students then complete 18 problems on their own in which they use proportional division....
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Space Shuttle Statistics
students are the opportunity to enhance their computation skills using real life statistics associated with the Space Shuttle. Skills emphasized include working with fractions, decimals, percents, ratios and proportions, comparing units,...
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The Shadow Knows - Measuring Other Students
Eighth graders measure height and shadow length of other students on a sunny day and develop a ratio. They apply the ratio to other students and objects using shadows to determine height.
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Solving Percent Problems with Proportions
Seventh graders explore the concept of percent problems. In this percent problem lesson, 7th graders use proportion equations to solve percent problems. Students find percentages of numbers and use proportions to determine percents in...
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Ratios
In this ratios worksheet, 6th graders solve and complete 3 different types of problems. First, they divide each amount shown in the ratio of 2 to 3. Then, students explain why the amounts worked out to be whole numbers.
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Similar Figures
In this similar figures worksheet, students solve and complete 4 different problems. First, they write a proportion and substitute. Then, students find the cross products and simplify. Finally, they divide each side to find the value in...
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Lessons for Beginner Atlatl Users
Ninth graders research weapons of the Aboriginal people and throw a dart with and without the use of an atlatl. In this cross curricular lesson, 9th graders research the weapons of the Aboriginal people. They throw darts with and without...
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Math: Currency Exchange Rates
Sixth graders apply the division and multiplication of decimals to convert dollars to various international currencies. In a travel simulation activity, they convert money, distance, and temperatures. During their "trip," students...
Illustrative Mathematics
Gotham City Taxis
Taxi! Have your travelers figure out how far they can go in a taxi for $10.00. They must account for the mileage rate and tip in their calculation. They can set up a table or make an equation to solve for the exact mileage they can...