Curated OER
Dividing Algorithm
Fifth graders solve a variety of math problems using division with remainders. They discuss the steps in the dividing algorithm and solve sample problems on the board. Students then solve division problems in teams, participating in a...
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Comparing Fractions
Students discuss the nature of fractions and compare fractions based on a similar whole to determine relative size.
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From Probability to Combinatorics and Number Theory
Learners see how division is used to help solve probability problems. They use tables as data structures where they are used to count outcomes and to compute probabilities. Students use games to help solve probability problems.
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Area Explorations
Learners explore the concept of area. In this area lesson plan, students find the area of irregular shapes with right angles. Learners break down each irregular shape into multiple regular shapes in order to find the area. Students...
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Clock Arithmetic and Cryptography
High schoolers investigate modular clock arithmetic and cryptography. They perform basic operations in modular (clock) arithmetic and encode and decode messages using simple shift and affine ciphers.
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Rhythmic Multiples
Students practice multiples of the numbers 1-9 and different manipulative skills such as clapping and snapping.
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Construction Square Fun
Students identify numbers as prime or composite and complete prime factorization of composite numbers.
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Estimation Investigation
Students view an interactive video to explore the concepts of estimation. They work cooperatively to measure, make comparisons, make predictions, and verify results.
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Understanding Celsius
Student read both Celsius and Fahrenheit temperatures on thermometers. They covert the temperatures and write poems to show understanding.
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Probability and Sports
Students research topics on the internet where probability is relevant. Students study statistics and probability concepts by looking at practical questions that arise in professional sports.
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Counting Cubes
Students count backwards in 2s from 30 then try other skip patterns such as 1,3,5, etc. and invent their own counting patterns. They are introduced to the problem using a pile of cubes and count by 2s and have a remainder.
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The Distributive Property
Students review how to solve problems using the Distributive Property of Mathematics. They solve problems using the paper and pencil method and then use the graphing calculator to discover the property over addition while making a visual...
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Linear and Exponential Growth
Students explore the concept of linear and exponential growth. In this linear and exponential growth lesson, students collect data about China's population. Students model the data to determine if it is linear or exponential.
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Clock Arithmetic and Cryptography
Students explore the concept of modular arithmetic and cryptography. In this modular arithmetic and cryptography lesson, students use applets to explore modular arithmetic using a clock and Caesar Ciphers. Students exchange their ciphers...
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Matrix Operations
Students solve problems using matrices. In this algebra lesson, students add, subtract and multiply matrices. They use the graphing calculator to simplify and graph linear equations.
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Exponential and Exponents Functions
Students solve problems using exponential properties. In this algebra instructional activity, students differentiate between exponents, exponential and log functions. They graph their functions using table and exponents.