EngageNY
Families of Parallel Lines and the Circumference of the Earth
How do you fit a tape measure around the Earth? No need if you know a little geometry! Pupils begin by extending their understanding of the Side Splitter Theorem to a transversal cut by parallel lines. Once they identify the...
EngageNY
Linear Equations in Disguise
In the eighth segment of a 33-part unit, learners look at equations that do not appear to be linear at first glance. The equations are proportions where the numerators and denominators may have more than one term. To round out the...
Illustrative Mathematics
Security Camera
A different-than-normal problem that allows learners to practice their reasoning to find an answer. The problem bases itself off a graph drawing of a store that needs to install security cameras. The challenge is to find which placement...
Curated OER
Solving Problems with Proportions
Seventh graders explore the concept of proportions. In this proportion lesson, 7th graders play a review game involving whiteboards. Students work in groups to solve a given proportion the fastest. Students also work in pairs to solve...
Curated OER
Ratio and Proportion
Students investigate ratio and proportion. In this middle school mathematics lesson, students write ratios and find equal ratios. Students use ratio and proportion to distinguish between healthy and unhealthy body proportions.
Curated OER
Ratios and Proportions
In this ratios and proportions worksheet, students complete a series of short answer questions based on different charts and word problems dealing with ratios and proportions. Students complete 9 problems.
Curated OER
Scale factors: Ratios and Proportions
Pupils 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.
Curated OER
Ratios, Proportions, and Percents - Week 4
In this ratio, proportion and percent worksheet, learners solve problems involving ratios and proportions. They identify the percent of increase and decrease, solve ratio problems with proportions, and find sale prices. This two-page...
Curated OER
Ratio and Proportions
Learners explore the means and extremes of a proportion, the how to make a scale drawing.
Curated OER
Ratio and Proportion
Students explore ratios and proportions. In this ratios lesson plan, students work in groups to identify the ratio of boys to girls, as well as the ratio of vowels to consonants in their names. Given a bag of candy, students work in...
Curated OER
Balancing the Scales: Understanding Ratios
Young scholars are introduced to the concept of ratios. In groups, they convert sets of numbers into a ratio. After practicing, they use the ratios and proportions to solve story problems. They also calculate map distances and...
Curated OER
Ratio Relationships
Students solve for the different ratio and proportion of a problem. In this geometry lesson plan, students show their knowledge of how to solve proportional relationships. They convert between percent, decimals and fractions.
Curated OER
Proportional Segments Between Parallel Lines
Students identify similar triangles. For this proportional segments lesson, students identify corresponding sides, set up ratios, and find the length of the missing side of a triangle. They use the parallel/proportionality...
Curated OER
Proportions
Young scholars study proportions. In this mathematics lesson, students measure their body length, head length, and ratio of their body, write their findings on a group chart, and discuss how a person's head size or arm span are in...
Curated OER
Proportions
Seventh graders participate in a lesson that focuses on having them solve different proportions. The lesson includes an example that the teacher can work from in order to deliver direct instruction.
Curated OER
Proportion Problems
Seventh graders explore the concept of proportions. In this proportions lesson, 7th graders determine which offer is the better deal given two pizza offers. Students use cross products to solve proportions. Students write directions...
Curated OER
What's My Ratio?
Students investigate ratios of various objects. For this ratios of various objects lesson, students draw pictures on graph paper and then dilate or shrink the image. Students determine the ratio of their pictures. ...
Curated OER
Ratios, Proportions, and Percents
Eighth graders use ratios and proportions to solve real-life problems. For this using ratios and proportions to solve real-life problems lesson, 8th graders estimate the cost of a road trip. Students estimate the distance...
Curated OER
Robot Ratios
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.
Curated OER
Proportions a/b=c/d
Students calculate distance and proportion of objects. In this algebra lesson plan, students define proportion and how it is used in math. They solve the problem through guided instruction.
Curated OER
Recipes and Ratios
Students use ratio and proportions to adjust recipe size. In this middle school mathematics instructional activity, students investigate Native American food and adjust the recipe size for said foods to the number of servings...
Curated OER
Are You a Golden Ratio?
Students explore the concept of the golden ratio in nature and architectural design. They discuss examples such as petals on a sunflower and the Parthenon. In small groups they take turns measuring their body parts to find a golden ratio.
Curated OER
Baseball Proportion
Eighth graders measure regular baseball bats and souvenir bats in centimeters. They determine how tall a person would be to be in proportion to the souvenir bat, create a poster depicting the person, and explain the proportional...
Curated OER
A Matter of Proportion
Students measure the relative heights of the mosaic giraffe and its trainer and compare their proportions to an actual giraffe and zoo trainer.
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