Curated OER
Adding Decimals with Hundredths
For this worksheet, students learn to add decimal numbers to the hundredths. Students first compare adding and subtracting decimals with the corresponding fractions in 6 problems. Then students add 35 decimal numbers mentally, filling...
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Base 3
High schoolers investigate this problem that aims to give a better idea of our decimal system by looking at a comparable system - the base 3 system. By seeing how base 3 numbers work students should have a better appreciation of base 10...
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Ordering Objects By Length
Students compare and describe objects of differing lengths that are presented in a Mathkeys software compare mat. Working in pairs, one student is the chooser who sets up the objects while the other student is the sizer who puts the...
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Buying My First Car
Students pretend they are about to buy their first new car. They must do all the calculations necessary to estimate the cost of purchasing the car. They see that the math they learn in school really does have real-life applications.
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Roman Toothpicks
Second graders make a chart comparing Roman numerals and our number system using toothpicks and construction paper. This clever lesson plan has students use toothpicks to create Roman Numeral translations for standard numbers.
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Pardon me. Do You Have exChange for a Dollar?
Students are familiar with United States currency-dollar and cents. They are asked to compare it with currency of another country. Students explore currencies of various countries using the Internet, video, and hands-on activities. ...
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100 More 100 Less
Third graders review the concept of place value and number sense. With a partner, they are given four cards with numbers on them. Using the cards, they practice making new numbers and completing addition and subtraction to find the...
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Locating the Salt Front
Learners use Hudson River salinity data to create a line
graph that shows the location of the salt front, and use math
skills to explore how this location varies over time. They use the graph to estimate the location of the salt front...
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The Nature of Mathematics
Students work in groups to describe plants using numbers. In this number instructional activity, students use numbers to define plants and then use numbers to write descriptions of themselves.
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Geometric Shapes at the OK Corral
Students explore geometric shapes. In this math instructional activity, students identify geometric and non-geometric shapes using the computer. Students research geometric shapes in art and architecture.
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Pi Digit Distribution
Students study graphing skills and compare and contrast data sets. They compute pi through the first 50-100 digits and create a bar graph showing the frequencies of specific digits.
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Prints and Outlines
Students determine the area of two objects by superimposing one on the other. They compare and order the area of different shapes by covering a larger shape with similar smaller ones. They complete these activities as different stations.
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Call Me
Students write essays to persuade their families to use a particular long-distance phone plan. They compare a 10-10 plan to a regular long-distance plan.
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Charting Attendance Rate of Busch Gardens
Sixth graders, in groups, are given different parts of the whole project. They use information from Busch Gardens to explore line graphs, averages, and other math vocabulary.
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Area graphics for 7th graders
Students randomly select dimensions for three geometric shapes (square, right triangle and circle). From the graphs they compare and contrast the graphical results of each shape.
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Ordering and Computing with Negative Fractions and Decimals
Seventh graders explore the concept of computing negative fractions and decimals. In this negative fractions and decimals lesson, 7th graders compare ordering positive fractions to ordering negative fractions. Students use mirrors to see...
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Pocket Money
Students discover that the mathematics behind this question is a comparison of the rate at which adding a fixed number increases the total compared to continual doubling of a number. In fact no matter what whole numbers you start with,...
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Mathematics Within: Algebraic Patterns
Students discover patterns in linear equations by playing a dice game to collect data. They graph the data and analyze the patterns of the lines created by the data. The class then compares the individual graphs to evaluate the position...
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The Box with the Greatest Volume
Students use measurement tools to measure the nearest 16th of an inch. They connect fractions and their decimal equivalents and compare this with other decimals. Finally, the class uses algebraic concepts and formulas to solve problems.
Pennsylvania Department of Education
Seeing Doubles
Students work with dominoes to recognize the number of spots on each side as they relate to addition facts. In this seeing doubles lesson, students make triangle shaped flash cards for the double facts. Students represent the correct...
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The Many Faces of Coins
Young scholars examine and discuss the designs on the circulating coins produced by the United States Mint. They read about the woman and child featured on the Golden Dollar. They compare and contrast coins using a Venn Diagram.
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Food and You
Young scholars examine the types of foods they eat. They describe the different components and resources that go into making their favorite foods. They also compare the resources going into different foods and identify ones which are...
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Water Use Around the World
Students compare their water use with other places around the world. They calculate the amount of water they use in a week and discuss how to conserve water. They discover the amount of clean water throughout the world.
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Growing Up
Students solve a given problem and explain their thinking using two number sentences to match their answer. One number sentence must use addition, one must use multiplication, and students must explain their answers. Includes sample...