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Scale/Ratio
Investigate the use of ratios in scale drawings. Learners scale objects up or down using ratios then find the actual size of something using ratios. They apply their knowledge of ratios as they make their own telescopes in science class....
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Effects of Changing Dimensions Proportionally
In this geometry worksheet, learners describe the effect of a proportional change on the perimeter or circumference and area of the given circles or quadrilaterals. The one page worksheet contains ten problems. Answers are included.
Primary Resources
Ratio and Proportion
A great way to practice ratio and proportion problems. There are three word problems that set the stage, images and table help learners see how each problem is solved. A very useful tool when introducing or reviewing proportions and ratios.
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Using Similar Polygons
In this geometry instructional activity, students use the properties of similar polygons to find the indicated missing length or the scale factor. The two page instructional activity contains twenty-two questions. Answers are included.
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Effects of Changing Dimensions Proportionally
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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The Golden Ratio
Students solve problems using ratios and proportions. In this algebra lesson, students verify proportions, solve for the unknown and use real life scenario to model proportion.
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Points on a Line Segment
In this geometry worksheet, 10th graders solve a problem relating to the length of a line segment. The location of the points on the segment is given in terms of ratios. The one page worksheet has one problem with the solution.
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Basic Proportions Worksheet
In this middle school mathematics worksheet, students use cross multiplication to solve proportions. The interactive worksheet has a "step-by-step" link for an in-depth solution. The one page worksheet has twenty problems.
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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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Ratio and Proportion Crossword Puzzle
In this Algebra I worksheet, 9th graders solve a crossword puzzle that is based on the vocabulary associated with ratio and proportion. The one page interactive worksheet contains fourteen clues and is self checking.
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Scale factors: Ratios and Proportions
Students create building and models using scale factors. In this geometry lesson, students apply the properties of ratio and proportion to solve problems. They identify the means and extremes property of cross multiplication.
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Proportions a/b=c/d
Students calculate distance and proportion of objects. In this algebra activity, students define proportion and how it is used in math. They solve the problem through guided instruction.
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Robot Ratios
Students measure the activity and parts of a robot. In this algebra instructional activity, students explore ratio and proportion using their classroom. They apply properties of fractions as they cross multiply to solve problems.
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Spin Your Turbines
Students relate electrical power and how it works to math. In this geometry lesson, students analyze how a hydroelectric plant works and calculate the amount of electricity that is produced by a typical generator. This lesson uses...
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Recipe: Unit Rate
Students solve problems using ratios and proportions. For this algebra lesson, students identify the unit rate and convert between fractions and decimals. They create graphs from their data.
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Currency Exchange
Students investigate the currency exchange rate. In this middle school mathematics lesson, student use proportions to exchange between the U.S. dollar and the euro. Students come up with a product they would like to buy and determine...
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Currency
Young scholars investigate currency and exchange rates. In the middle school mathematics lesson, students use ratio and proportion to convert from one type of currency to another. Young scholars solve problems involving currency exchange.
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Recipes and Ratios
Students use ratio and proportions to adjust recipe size. In this middle school mathematics lesson, students investigate Native American food and adjust the recipe size for said foods to the number of servings needed to feed the...
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Ratio and Proportion
Students investigate ratio and proportion. In this middle school mathematics instructional activity, students write ratios and find equal ratios. Students use ratio and proportion to distinguish between healthy and unhealthy body...
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Math: "Scales"
Third graders investigate ratios and rates. In this third grade mathematics lesson plan, 3rd graders identify equal ratios and rate and test for proportionality. This lesson plan is created to be use in conjunctions with a particular...