Khan Academy
Khan Academy: Adding 53+17 by Making a Group of 10
Sal adds 53+17 by breaking apart the numbers and making a group of 10. [3:35]
Other
Chiropractic Research Results for Different Conditions
Did you know that through the manipulation of the spine people receive some relief from serious conditions such as Autism, Cancer, and Ulcers? This site provides of list of such ailments and connects the user to articles relating the...
Illustrative Mathematics
Illustrative Mathematics: 4.nf Making 22 Seventeenths in Different Ways
This task is a straightforward task related to adding fractions with the same denominator. The main purpose is to emphasize that there are many ways to decompose a fraction as a sum of fractions, similar to decompositions of whole...
Illustrative Mathematics
Illustrative Mathematics: 4.nf Comparing Sums of Unit Fractions
The purpose of this task is to help develop students' understanding of addition of fractions; it is intended as an instructional task. Aligns with 4.NF.B.3.a.
Khan Academy
Khan Academy: One Step Addition & Subtraction Equations: Fractions & Decimals
Practice solving equations in one step by adding or subtracting a number from both sides. These problems involve decimals and fractions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Khan Academy
Khan Academy: Add Polynomials (Intro)
Students practice adding polynomials with these exercises. They receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Other
Optometrists Network: Attention Deficit Disorder
Use this comprehensive index linking to various articles and online resources about ADD to learn more about the disorder, how it is treated, and current related news and information.
Lesson Tutor
Lesson Tutor: Add and Adhd Home Page
Common sense tips and new techniques are included here in a number of articles related to ADD and ADHD.
Better Lesson
Better Lesson: Go Fishing for a Ten
Second graders use a familiar card game to help them build their math fact fluency for facts where the sum is 10.
Better Lesson
Better Lesson: Go Fishing for Doubles
Second graders play a favorite card game which practices the quick and accurate recall of double facts.
Better Lesson
Better Lesson: Adding, Subtracting, and Understanding Decimals
Students learn how to properly add and subtract decimal quantities.
Better Lesson
Better Lesson: Adding and Subtracting Integers With Counters
What are opposites and what happens when you add them together? Students work with counters to model adding and subtracting integers.
Better Lesson
Better Lesson: Adding and Subtracting Integers on a Number Line
Sixth graders work with a number line and football to model adding and subtracting integers.
Better Lesson
Better Lesson: Adding and Subtracting Decimals
Sixth graders use estimates and work on strategies for adding and subtracting decimals.
Better Lesson
Better Lesson: Adding and Subtracting Fractions
Understanding that when the total number of parts of a whole are the same, fractions can be added.
Better Lesson
Better Lesson: Put It Together and Take It Apart
Second graders increase their understanding of place value by manipulating larger numbers.
Better Lesson
Better Lesson: Put Together or Take Away?
First graders learn the basics of 1.OA.1 by mixing addition and subtraction word problems from day 1. The focus question is: Put together or take away?
Better Lesson
Better Lesson: How Big Is a Mile?
How far do I have to walk in order to make 1 mile? Students measure, add, and figure it out.
National Council of Teachers of Mathematics
Nctm: Illuminations: Grouping and Grazing
Help the alien spaceship move cows into corrals by counting, adding, and subtracting. This activity helps children learn grouping, tally marks, and place value.
ABCya
Ab Cya: Sum of All Dice
The Sum of All Dice is a great game for children to practice addition! Swipe the screen to roll 2 through 5 dice. After adding the total on the dice, click on the correct sum listed on the chalkboard! If the dice roll out of view, simply...
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide Addition, Subtraction Within 1000 With Word Problems to 100
A guide to support parents as they work with their students in addition and subtraction within 1000 with word problems to 100.
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Sums and Differences to 20
A guide to support parents as they work with their students in sums and differences to 20.
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Number Pairs, Addition and Subtraction to 10
A guide to support parents as they work with their students in number pairs, addition and subtraction to 10.
CK-12 Foundation
Ck 12: Algebra: Addition and Subtraction of Rational Expressions
Learn how to add and subtract rational expressions.