Curated OER
Standard Sizes of Paper
Young scholars measure the dimensions of different sizes of paper. Using a copy machine, they discover dilations. After enlarging and shrinking particular copies, students examine rates, ratios and percentages and discover the...
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Standard Envelope Sizes
Students measure the length and width of various sizes of envelopes. After comparing the envelopes, they explore the ratios, percentages, and rates. Students discuss postal rates and compare the cost of mailing items, delivery times, and...
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Ratio and Probability
Fifth graders investigate the mathematical concepts of ratio and probability using created spinners and data collection techniques in this Math lesson for the fifth grade classroom. This lesson can be accomplished as an individual or...
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Mixing Colours
Students explore ratios and their relationships to fractions. They explain the process of identifying ratios and describe their comparison. Students write ratios as fractions and by using colons. They convert the ratios to percents.
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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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Asthma "Outbreak" Exercise
Students investigate numerical data on a possible asthma epidemic. Using statistical information, students graph and figure ratios of the epidemic. They evaluate the mortality rate from severe smog in the 1950's in London.
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What's the Deal with Probability?
Eighth graders examine probability. Students read real life situations involving math. Upon completing probability problems, they express their answer as a fraction, decimal or percent.
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Playing With Probability
Sixth graders investigate probability. They use ratios to solve simple probability situations. Students express their solutions in the form of fractions or decimals. They predict outcomes and complete probability worksheets.
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What percent of ratio is proportion?
Ninth graders investigate the concepts of ratio and proportion.They solve examples with the teacher for ratios and proportions. A basic fraction review is used for a warm up in this instructional activity. The primary focus of the...
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Ratios
Sixth graders pariticipate in a lesson that focuses on the finding of a ratio and using it to set up a proportion in realtionship to creating a scale drawing. This is done using given problems. It would be valuable for students to have...
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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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A Real-Life Application of Ratio
Students discuss the concept of "aspect ratio" of the Helios Prototype. They find real life objects that are taller or shorter than them by a certain amount. They practice with ratio and measurement.
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This is to That
Students look at ratio, what it means for numbers or objects to be in a given ratio, and how ratios and fractions are related. They write and solve story problems which involve whole numbers, using addition, subtraction, multiplication,...
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Scale Basketball
Young scholars discuss scale diagrams and maps as well as the use of spreadsheets to find the best scale to use in a model before practicing scale and ratio problems on their own.
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Exploring Gear Trains
Students work together to build a simple gear train. They record their observations as it gains speed and how the gears rotate. They develop rules about gears based on these observations.
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Determining the Proper Cement: Water Ratio for Quality Concrete
Young scholars examine concrete samples and guess their strength. They determine the correlation between concrete strength and the cement to water ratio that was used in making each sample. They make a quality concrete based on their...
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Dino Long Legs
Students calculate the stride length of a walking or running animal. They use scale models of dinosaurs to calculate the leg and stride length of the animals.
Curated OER
Icing On The Cake
Eighth graders follow a recipe, focusing on the concepts of ratio and proportion, to mix a batch of icing. They decorate cupcakes in the form of a pumpkin.
Government of Alberta
Learn alberta.ca: Math Interactives: Rate/ratio/proportion (Object Interactive)
This highly interactive resource uses the backdrop of digital photography to explore equivalent forms of 3-term ratios. Printable activities, solutions, and learning strategies are also provided.
PBS
Pbs Learning Media: The Fastest Broom
The CyberSquad tests which broom can travel the furthest in five seconds in this video from Cyberchase.
University of South Florida
Fcat: Using Proportions and Go Fish!
Students "go fishing" and use proportions to learn how estimating is used to determine the size of a population.
National Council of Teachers of Mathematics
The Math Forum: Leonardo Da Vinci Activity
At Math Forum, students explore the Vitruvian Man diagram and test Leonardo's theory of the ratio of height to arm span.
University of Texas
Inside Mathematics: Truffles [Pdf]
This task challenges a student to demonstrate understanding of ratios and proportions. Students must determine a generalized rule from an understanding of ratio and proportional reasoning in a given real-world context.
McGraw Hill
Glencoe: Self Check Chapter Test Exploring Ratio, Proportions, and Percent
The interactive assessment examines ratios, proportions, and percents. Students complete 14 questions created by Glencoe. Hints and solutions are included.