Curated OER
Codebreaker Math
Students solve addition and subtraction problems and decipher and write messages using a code. They read and discuss an informational fact sheet about the Navajo code talkers from World War II, and decode and re-code messages using math...
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Centipede's 100 Shoes
Young scholars solve equations with the help of their teacher. In this simple equations lesson, students listen to the story Centipede's 100 Shoes by Tony Ross and use the scenarios given in the book as addition and subtraction problems....
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Investigation - Who is Right?
Third graders explore mathematics by solving problems in groups. In this math functions activity, 3rd graders demonstrate their understanding of addition and subtraction by completing two digit math problems. Students define a list of...
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Rounding and Significant Digits
Practice rounding numbers to a certain decimal by solving in-class problems. Learners will solve several multiplication, division, addition, and subtraction problems while rounding to a specific decimal. They will also check their work...
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Food Pyramid Power: Looking Back and Moving Forward
Pupils show their knowledge of properties of objects as it pertains to sorting and creating patterns. In this food pyramid power lesson plan, students show their ability to use whole numbers in different representations by appling...
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Subtraction with Regrouping
Second graders work with two-digit subtraction problem, identify the sums by playing Bingo, and create four subtraction problems for homework.
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Make a Match
Second graders examine the relationship between addition and subtraction. In this number sense lesson, 2nd graders practice their computation skills and use various strategies (including manipulatives and calculators) to...
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Subtraction
Second graders regroup two-digit numbers and solve advanced subtraction problems with regrouping; students use straw and cup manipulatives to demonstrate how to borrow from the tens place in order to solve the problem.
Alabama Learning Exchange
Introduction to Division
Examine how addition, subtraction, multiplication, and division relate to and are separate from each other. As they listen to the book, The Doorbell Rang, they demonstrate the math described in the story by cutting up paper cookies...
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Multiplication and Areas
Upper graders solve problems involving measurement of squares and rectangles to practice multiplication skills, finding area, and calculating prices and percentages. A performance assessment is included.
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Well,Well!
Second graders explore and solve a math word problem that involves a series of single digit additions and subtractions. They brainstorm ways to solve the problem, independently solve the problem using drawings, and discuss the various...
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One-Digit Addition and Subtraction No Regrouping (A)
In this math worksheet, students solve 81 problems in which one-digit numbers are added and subtracted. Problems are in a vertical format with addition and subtraction mixed in each row.
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One-Digit Addition and Subtraction (A)
In this one-digit addition and subtraction worksheet, students problem solve and calculate the answers to forty-nine addition and subtraction equations.
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Relationship Between Addition and Subtraction
Students are taught how to add and subtract and use number sense to solve basic math problems. In this addition and subtraction lesson, students are being taught using theories from different philosophers in education. They are given a...
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Subtracting Two-Digit Numbers
In this math worksheet, students solve three word problems involving subtraction. The first problem is guided. Students use the questions to solve the problem. Students solve two more problems without the guide questions.
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Goldfish Subtraction
Students manipulate Goldfish crackers to explore subtraction and number sentences.
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Book Title: Ten Flashing Fireflies
This instructional activity engages learners in a variety of activities to build 1 to 1 correspondence, estimation, and problem solving skills. They discuss problem solving strategies, hear the story Ten Flashing Fireflies, compose...
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Let's Shop
Upper graders add and subtract decimals, using concrete objects and story problems. Note: The Concentration Cards and Homework assignment link at the bottom of the plan doesn't work.
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The 500 Problem
Students explain face, place and total value of numbers as well as solve three-digit subtraction problems. Before trying answer the problem Students must be able to examine that the same digit is used to represent different amounts.
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Mental Subtraction Methods
In this math worksheet, students learn a strategy to mentally subtract a single digit number from a two digit number such as 53-8. Students follow the detailed instructions to subtract in 18 problems.
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Twenty Questions: The Hundred Chart
Use the 20 Questions game to practice math vocabulary and number properties! Project a hundreds chart and hand one out to learners. Ideally, give them counters (beans would work well) to mark off the chart so you can play multiple times....
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Math Shortcuts
Looking for a different way to introduce long division? Need a shortcut for checking multiplication answers? Then this is for you! The multiplication method uses a quick trick to check for accuracy. The division method allows learners to...
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Book Title: You Can’t Buy a Dinosaur with a Dime
Students explore the concepts of multiple digit addition and subtraction. For this addition and subtraction lesson, students read the book You Can’t Buy a Dinosaur with a Dime and then discuss methods for solving a particular math...