Curated OER
Understanding Pi.
Students study the relationship between circumference and diameter to come up with Pi. "In this pi lesson, students measure, record and find the ratio "circumference/diameter" and their average which is an approximation of pi.
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Music Styles
In this music styles learning exercise, students fill in a chart about the different music styles of their classmates and find the ratio, fraction, decimal, and percent of each style. Students complete 4 styles.
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Algebraic Translator
In this algebra worksheet, students complete word problems with ratios, splitting up numbers, and all operations. Students complete 10 word problems.
Curated OER
If Those Dolls Were Real People
Students explore shape perceptions. In this body image lesson, students take measurements of childrens' toys and use ratios to determine what the dolls would look like if they were real human people. Students discuss the implications of...
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The Two Circles Problem
In this area of a circle worksheet, students determine the ratio of common area when two circles overlap and each passes through the center of the other. A detailed sollution is included.
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Currency
Students 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. Students solve problems involving currency exchange.
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A Blast From The Past
Students investigate ratio and proportion as they solve problems. In this algebra lesson, students calculate the percent increase on salaries and convert between decimals and percents to calculate. They rate job positions from 1936...
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Genetics Review
Students complete a Punnett square and list the probability and ratio of the offspring's genotype and phenotype in this genetics worksheet. There are 8 problems to complete, and are challenging to work on.
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Law of Sines
In this Law of Sines worksheet, students use trigonometric ratios to determine angle measurement and/or the length of the side of a triangle. This one-page worksheet contains ten trigonometric ratio problems.
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Thrust to Weight Ratio and Excess Thrust
Students, after reading an explanation from a NASA Web site, demonstrate an understanding of the text by applying it to questions involving the Thrust to Weight Ratio and Excess Thrust of an aircraft.
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Ratio Test
In this college level Calculus worksheet, students use the ratio test to determine if a series converges or diverges. The one page worksheet contains six problems. Solutions are not provided.
Illustrative Mathematics
Hexagonal Pattern of Beehives
Young geometers and biologists investigate the math of nature in an activity that is just the bee's knees. Participants will study the tessellations of hexagons in a beehive, along with the natural rationale behind the specific shape....
Mathematics Assessment Project
Sharing Costs Equitably: Traveling to School
Drive or take the school bus? Class members determine the amount each student would have to pay in a carpool situation. They then evaluate the cost in a set of provided examples. I think I'd rather take the school...
Yummy Math
US Holiday Candy Sales
Candy is a big business! Calculate the amount of money consumers spent on major holidays—Easter, Halloween, Christmas, Hanukkah, and Valentine's Day—based on the total amount of candy sales from 2011 and the percentage of each holiday's...
Curated OER
Recipe For Disaster
Students play an interactive game online to learn ratios. For this statistics lesson, students solve problems in an online game about ratio and relating statistics to the real world. This lesson provides hands on as well as teaching time.
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Similar Polygons
In this similar polygons worksheet, 10th graders solve and complete 20 various types of problems. First, they solve each proportion. Then, students write a ratio expressing the slope of a line through each pair of points. In addition,...
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Inheritance in Maize
Learners use mutant corn ears to investigate inheritance patterns. In this inheritance lesson plan, students count the number of corn kernels of each phenotype in mutant and wild type ears of corn. Learners calculate the ratio of...
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Beans and Genes/Genetic Probability
Students use 2 sets of colored beans to represent the genes of an organism. In this genetic probability lesson plan, students use the colored beans to represent the genotypes of offspring which they pull out of a box at random while the...
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Scaling in Maps
In this recognizing map scale ratios worksheet, students use ratios and centimeter measurements to calculate the distances in reality. Students solve 8 problems.
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Finding Trigonometric Ratios
For this finding trigonometric ratios worksheet, 11th graders solve and complete 22 various types of problems. First, they find the value of each trigonometric ratio to the nearest ten-thousandth. Then, students use a calculator to find...
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What Number Differs from its Reciprocal by 1?
In this reciprocal worksheet, students identify the number that differs from its reciprocal by 1. The significance of this number is that it is the golden ratio. The solution to the problem is provided.
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Pyramid in The Desert
Students investigate the Sierpinski triangle and calculate the ratio and area of the triangle. In this fractals instructional activity, students calculate parts of a Sierpincki triangle. They use Google Earth to help them construct the...
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Using Proportions to Estimate
Students calculate ratio and proportion. In this unit rates instructional activity, students estimate using proportions and find their errors in doing so. They calculate unit rates and define the concept of unit rates.
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Estimating Deer Population
Students calculate the deer population using proportion. In this algebra lesson, students apply the concept of ratio and proportion to real life scenario.
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