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Curated OER
Integers
Using a simple technique, learners practice identifying integers on a number line. As numbers, both positive and negative, are pointed to, they name them. This could be part of anticipatory set before a lesson on integers.
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Carry and Borrow
Second graders complete basic math computations. In this addition and subtraction lesson, 2nd graders learn how to carry and borrow numbers when adding and subtracting. Students learn a carrying song to help them remember. Students...
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Living in Base Ten
Students explore scientific notation and the structure of the metric system. In this middle school mathematics lesson, students read How Much is a Million? by David M. Schwartz to introduce students to the need for scientific...
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Three-Digit Addition and Subtraction With Regrouping
Second graders access prior knowledge of addition and subtraction using two-digit numbers and calculate easily with them. In this three-digit addition lesson, 2nd graders learn to add and subtract three-digit numbers with and without...
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How to Round Numbers
Students exercise rounding numbers to the nearest tens, hundreds, and thousands. In this rounding numbers lesson, students participate in a rounding numbers activity, covering the concept of rounding in both addition and subtraction.
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Modular Arithmetic
Students investigate modular arithmetic and how to use it to solve real world problems. In this modular arithmetic lesson, students use computers to work on modular arithmetic after a teacher guided lesson. They complete guided practice...
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Approximate Solution to an Equation
Learners solve equations through trial and error. In this algebra lesson, students first estimate their answers and then calculate it to check their work. They solve problems involving roots and integers.
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Number: Decimals
Students explore the concept of decimals. In this decimals lesson, students examine number patterns as they complete a worksheet that requires them perform multiplication with decimal numbers.
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Numbers: Rounding Off
Students discover the idea of rounding numbers. In this rounding lesson plan, students are given worksheets having to do with rounding whole numbers and fractions. Students participate in an activity with number flashcards....
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Rounding Numbers
Fourth graders complete math problems where they round numbers to the nearest ten, hundred, or thousand. In this rounding lesson plan, 4th graders explain how to round the problems they solve.
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Maya Math: From Zero to Nineteen
Students explore counting methods of the ancient Maya, and practice identifying Maya number glyphs.
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Adding and Subtracting Decimals
Students practice adding and subtracting numbers with decimals. In this decimals lesson plan, students use grid paper and money to learn how to add and subtract decimals.
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Ten Little Black Dots
Second graders use black and red construction paper to symbolize different one digit numbers that add up to 10. In this sums to 10 lesson plan, 2nd graders discover different combinations and patterns that can lead them to the number 10.
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Fractions and Fact Families: Jump Kangaroo Jump!
Second graders practice with fractions and fact families. For this fractions and fact families lesson, 2nd graders participate in a series of activities to assist them with understanding fractions. Activities include graphing,...
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Light Beam
Students measure and convert between units. In this geometry lesson, students investigate through measurements of distances. They relate the properties of circle to solving problems with radius, diameter and area.
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Working Watermelon
You're going to wish you had a watermelon for this lesson! Class members read about watermelons and make a salad in class to sample. They also perform estimates, measurements and calculations on a watermelon. They predict what percentage...
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Clock Arithmetic and Cryptography
Students explore the concept of modular arithmetic and cryptography. For this modular arithmetic and cryptography lesson, students use applets to explore modular arithmetic using a clock and Caesar Ciphers. Students exchange their...
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Roll `Em!
First graders engage in using base ten blocks and dice for a fun engaging math lesson. They use a worksheet imbedded in this lesson as the game board to help them play this math game.
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50 State Quarter Game
Learners, using their knowledge of place value and number sense, play this counting game in small groups, or as a whole class, to see who be the first person to reach 50 cents.
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Pardon Me. Do You Have Change For a Dollar?
Upper elementary and middle school learners explore currencies from a variety of countries. They use the Internet, video, and engage in hands-on activities. They practice converting U.S. currency to foreign currency and vice versa. This...
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Making Rectangles
Students study rectangles. In this math lesson, students use numbers, measurements and geometry to draw rectangles of varying sizes.
Pennsylvania Department of Education
Some Special Sums
Students study addition. In this math lesson, students solve doubles and doubles plus one addition facts. Students roll dice and use the numbers to create addition problems.
National Security Agency
Borrowing from Our Neighbors
Young mathematicians explore two-digit subtraction. They will investigate multiple ways to subtract numbers involving regrouping. Resources are provided.
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Roman Numerals
Students explore the concept of Roman numerals. They investigate the seven basic numerals and the symbols that are used in the Roman numeral system and their values. Students practice converting Roman numerals.