Curated OER
Simply Similar at Sea: Simple Triangles
Tenth graders answer a variety of problems based on similar triangle and learn about the rule of thumb. They will test the rule of thumb by estimating the distance to an object in the classroom.
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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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Build a Snowplow
Learners design and build a snowplow using LEGO materials. They compete in an Engineer's Challenge to clear a path through Styrofoam peanuts.
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Determining the Proper Cement: Water Ratio for Quality Concrete
Students 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 findings.
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Flying with Fractions
Students test their knowledge of the Wright Brothers and their aircraft, and compute ratio of two numbers to determine the ratio between wing span and length of aircraft.
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Learning About Ratios: A Sandwich Study
Students engage in a lesson which provides them with a concrete introduction to the concept of ratios. They demonstrate the ability to create ratios with given substances - peanut butter and jelly.
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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.
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Rates and Proportions
Students read a cookie recipe and complete a worksheet that asks them to establish ratios and proportions for various ingredients in the recipe.
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Monster Math
Students view projections of dinosaurs in order to comprehend their true size.
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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.
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Crazy Putty Ratio
Second graders use knowledge of measurements and ratios to mix various combinations of liquid starch and glue. They chart their ratios, make observations, and write a summary of the activity. They mix their own batch of Crazy Putty to...
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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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Ocean Animals vs. Humans
Students use critical thinking skills to solve word problems using ratios that allow them to compare humans to ocean animals.
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Similar or Not?
Fifth graders define the meaning of similar and congruent using concrete objects. They make similar and congruent figures using geoboards. They draw their figures on dot paper, and color their designs.
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Population Ratios
Young scholars access web site and record various population statistics pertaining to a county in the USA of their choice. They use this data to set up and solve ratios. They compare data to make meaning of the numbers.
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The Shadow Knows - Measuring A Telephone Pole
Third graders attempt to determine the height of a telephone pole or tree without climbing to the top.