CK-12 Foundation
Addition and Multiplication Properties with Real Numbers: The Secret of Subtraction
An interactive boosts mathematicians' knowledge of subtracting integers using a horizontal number line by way of multiple-choice, true or false, and discussion questions.
CK-12 Foundation
Properties of Rational Numbers: Lollipop Trees
A six-question interactive takes mathematicians to Lollipop Land where they manipulate lollipop trees to make equivalent ratios. Question types include multiple-choice, true or false, and a discussion.
Illustrative Mathematics
Equality Number Sentences
Understanding the concept of equality is fundamental to the success of young mathematicians. To explore this basic idea, children compare the dots arranged in pairs of rectangles in order to determine whether or not they contain an equal...
Alabama Learning Exchange
Finding Prime
Fifth and sixth graders explore prime numbers. They work with a partner to build rectangular arrays using twelve tiles. Factor pairs are noted and recorded on graph paper. Pupils construct rectangular arrays with a prime number and...
Curated OER
Pattern Puzzles
A short video introduces place value in addition and subtraction. As a class, your students identify all even numbers up to one hundred and explain the pattern. They use addition strategies to fill in the missing numbers on the number grid.
Curated OER
Playing the Cards of Place Value
Third graders explore place value to the ten-thousands place. For this amazing, 21-page place value lesson, learners represent numbers in standard and expanded form, and use technology to represent numbers to 9,999.
Curated OER
Area Model of Multiplication Using Base 10 Manipulatives
Explore two-digit multiplication with your class as they work in groups to build models of two-digit multiplication using base 10 manipulatives. They construct rectangles replacing standard numbers with equivalent place values using...
Curated OER
Planetary Place Value
Third graders explore place value to the ten thousands place. This incredibly thorough, 24-page lesson has learners construct, order, and compare numbers to 9,999. This three-day lesson includes reteaching and extension activities...
K-5 Math Teaching Resources
Base Ten Cards (tens and ones)
Strengthen your class's understanding of place value with this series of base-ten flash cards. Including illustrations representing a variety of numbers from 13 to 94, this resource can be used in many different ways...
Curated OER
ASL: Lesson 10
Focus on learning how to sign cardinal and ordinal numbers, nouns, and lexicalized fingerspelling. Here is lesson 10 of the series on learning ASL. Provided, are multiple links that provide a visual guide to proper signing. Teach your...
Curated OER
Subtracting One-Digit Whole Numbers
In this subtraction computation worksheet, 2nd graders solve 20 subtraction problems. All of the subtraction problems are one digit.
Curated OER
Exploring Real Numbers
In this algebra worksheet, 11th graders classify numbers as rational, irrational, integral and whole. They solve the equations and graph i ton a number line. There are 26 questions with an answer key.
Curated OER
Add Mixed Numbers With Like Denominators (B)
In this adding mixed numbers worksheet, students add whole numbers and fractions with common denominators. Students solve sixteen problems.
Curated OER
Add Mixed Numbers With Like Denominators (G)
In this adding mixed numbers instructional activity, students find the sums of whole numbers and fractions with common denominators and reduce and rename the answers. Students solve 7 problems.
Math Salamanders Ltd.
Unit Fractions of Numbers 5
In this finding the unit fractions of numbers activity, students divide to find fractions of whole numbers, find the missing numbers, use calculators to solve, and solve a word problem. Students solve 45 problems.
Curated OER
The Numbers Get Larger
Second graders examine how to use mental strategies for addition and subtraction. They look at part/whole strategies for multi-digit problems and define which one would be best used for a particular problem. They use tens frames to solve...
Curated OER
The Divider (whole number remainders)
Third graders use the lesson to support division of whole numbers where there is either no remainder or whole number remainders. They are able to
slit division problems into parts using known multiplication and division facts.
Curated OER
Count on Whole Hundreds: Addition
For this addition/counting worksheet, students add a "whole hundred" to another 3-digit number, then add 800 to a set of numbers. Answers are included on page 2.
Curated OER
Using Tens Frames for "Teen" Numbers
Sixth graders practice recognizing teen numbers for the part-whole strategy of bridging to ten. They approach the advanced counting stage to problem solve addition facts to ten utilizing dot patterns on a quinary frame with dot patterns...
Curated OER
MathKeys Software "Unlocking Whole Numbers, Vol. 11(Place Value for Four Digit Numbers)"
Third graders explore the place values of four digit numbers by writing four digit numbers and examining the effects of rearranging the numbers' digits. They practice making their four digit number with base-ten blocks then rearrange the...
Curated OER
MathKeys Software "Unlocking Whole Numbers, Vol 2 (Rolling the Highest Number)"
Third graders arrange four numbers in order to make the highest number possible. In this place value lesson plan, 3rd graders practice working with four digit numbers on the computer and with base ten blocks.
Curated OER
Number System
In this number system instructional activity, students complete several questions writing number sets for natural numbers, odd numbers, and prime numbers.
Curated OER
Number System
In this sets of numbers worksheet, students write sets of natural numbers, prime numbers odd numbers, and circle prime numbers. Students complete 4 problems.
Curated OER
Subtracting One- and Two-Digit Whole Numbers
In this math activity, learners subtract one- and two-digit numbers. Students regroup when needed to subtract. Learners show how they solve the problems.
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