Curated OER
Counting Triangles
Sixth graders examine triangles in a figure. In this geometry lesson, 6th graders establish a method for counting triangles within a given figure. Students discover that the total number of triangles is the sum of all numbers counted.
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Identify Similar Figures
Students explore the concept of similar figures. In this similar figures instructional activity, students develop the idea that similar figures are a different size but the same shape by comparing similar rectangles. Students use patty...
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Pizza Topping Combinations
Students brainstorm pizza toppings and determine the number of possible ways to order a pizza. In this algebra lesson, students analyze and investigate geometric patterns as they relate to the concept of a variable. Students then use a...
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Dividing Fractions
In this fractions worksheet, students multiply and divide fractions. Students multiply 4 fraction problems for review and divide 11 fraction problems.
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Discovering Pi
Students develop a formula that describes the functional relationship of the circumference of a circle to its diameter. Working with a partner, they measure the diameter and circumference of circular objects in order to discover the...
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Displaying Postcards
High schoolers solve a problem in a systematic and mathematical way. The use of an equation is applied to a word problem situation. It is necessary that students be familiar with different types of equations.
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Fractions
Fourth graders practice utilizing math skills by examining fractions. In this number sense lesson, 4th graders draw illustrations representing fractions given to them by their teacher. Students describe fractions with words as well.
American Statistical Association
How Random Is the iPod’s Shuffle?
Shuffle the resource into your instructional activity repertoire. Scholars use randomly-generated iPod Shuffle playlists to develop ideas about randomness. They use a new set of playlists to confirm their ideas, and then decide whether...
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Estimating Area
Fifth graders, after being given a variety of word problems to solve, find patterns to solving 3 out of 4 times. They break it down into smaller parts 3 out of 4 times and tell the method of solving 3 out of 4 times. Students complete...
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Supermarket Displays
Second graders look at the number patterns created when cans are stacked in different arrangements. The aim of the unit is for students to keep track of the numbers involved by drawing up a table of values. They are then encouraged to...
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Counting Pills
Students are introduced to the problem. They brainstorm ideas for approaching the problem and keeping track of what has been done. Students work on the problem in pairs to discover what strategies might help to find the answer.
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Jo's Table
Second graders work on the problem with a partner. They examine what they are supposed to be doing. They share the students's solutions making sure than they are looking for patterns along the diagonals.
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Taxi Fare
Learners discuss what they know about taxis and how they charge. They read the problem and work in pairs focusing their thinking on the repeating pattern of twos. They then share their solutions and conclude with some class practice...
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Buying a Car
Eighth graders create spreadsheets to calculate payments. They create a list of items they would like to purchase that require monthly payments. They simulate buying a car and create a spreadsheet to determine the amount of the monthly...
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Fire!, Probability, and Chaos
Upper elementary and middle schoolers work with the concept of probability. They are introduced to the concept of chaos. Learners graph and analyze using a line plot, work with mean, and are introduced to the concept of variance.
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Function Machine
Second graders decipher a pattern using input and output. In this functions activity, 2nd graders use input and output numbers to find a pattern involving addition and subtraction. Students use the pattern they discovered to help solve...
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Looking For Triangles
Students solve problems with triangles. In this geometry lesson, students analyze shapes to find different triangles. They name the shapes created by putting triangles together.
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Triangular Numbers
Students are introduced to the problem and brainstorm ideas for approaching the problem and keeping track of what has been done. They work in pairs and share their answers, explaining their reasoning.
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The Topsy-Turvy Twins
Fourth graders read the problem and brainstorm for ways to solve the problem - list these on the board for the students to refer to as they solve the problem. They work in pairs and focus on the strategy selected.
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You Can Count on Squares!
Fourth graders engage in and explore to develop mathematical, specifically algebraic, ideas. Although the tasks are built around measurement, they are algebraic to the extent that they require 'formulae' to be derived form the geometric...
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The Farmer's Sheep
Students use problem solving skills, logical thinking, and their ability to work sequentially in order to solve an algebra problem. They listen to the problem read aloud by the teacher and devise a plan in order to solve the problem.
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Bubblegum balls
Students look for patterns to solve problems involving statistics using different colored gumballs. They should be able to look for and find out all the possible outcomes based upon inference and trials.
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The Farmer's Sheep II
Fourth graders listen to the story of a farmer who only likes to be able to see nine sheet from his window. His wife has brought him another sheep - what now? They work together in pairs to solve the problem and share solutions.
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You Gotta Have Heart
Ninth graders investigate the concept of relations and interpret graphs and tables. They analyze given data and look for a pattern to determine if the numbers represent a function. Students practice solving scientific word problems that...