Math Cats
Math Cat: Fact Family Card
Everything you need to know about fact families can be found here. Discover what fact families are and learn different strategies for using them. Links included to print your own fact family cards, create a fact family house, and play a...
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Queen's Printer for Ontario
E workshop.on.ca: Effective Instr'n in Math, K 6: Multidigit Computation [Pdf]
Volume 5 in an eworkshop Guide to Effective Instruction in Math outlines and illustrates instructional strategies for teach basic facts and multidigit computation to students in kindergarten through grade 6.
Math Playground
Math Playground: Thinking Blocks
This lesson teaches students how to use colored blocks to model word problems. There are several sets of problems each for addition / subtraction, multiplication / division, and ratio word problems.
Other
Nearpod: Addition & Subtraction Strategies
In this instructional activity, students will relate counting to addition and subtraction and will learn several strategies for solving addition and subtraction problems.
K-5 Math Teaching Resources
K 5 Math Teaching Resources: Multiplication Strategy: Partial Products 2 [Pdf]
Break down numbers as a strategy to multiply one-digit by three-digit numbers and two-digit by two-digit numbers.
E-learning for Kids
E Learning for Kids: Math: Bbq Party: Counting Forwards & Backwards
Explore counting and number patterns with Lily as she throws a BBQ party.
AAA Math
Aaa Math: Adding Two Digit Numbers Mentally
Read these two strategies for adding two-digit numbers in your head. Then try out the one you like better by playing the game. Running totals of your correct and incorrect answers as well as a percent score of your correct answers will...
History is Fun
Jan Brett: Addition Facts Flashcards for 11 Pdf [Pdf]
Print out these colorfully illustrated PDF file pages to practice your addition facts when adding an eleven. Fold them in half and one side shows the problem while the other side shows the problem with the correct answer. Put them in a...
Queen's Printer for Ontario
E workshop.on.ca: Number Sense and Numeration, Grds 4 6: Addition, Subtract [Pdf]
Volume 2 of an eworkshop Guide to Effective Instruction in Math outlines and illustrates instructional strategies for teaching addition and subtraction to students in grades 4 through 6. Include a series of suggested activities.
Other
Welcome to mr.r's World of Math!!!
At this site, math word problems are presented in an exciting and creative format. Students attempt to find solutions to hilarious situations using their mathematical skills. To do this they must solve various math problems in a certain...
Khan Academy
Khan Academy: Estimate to Add and Subtract Multi Digit Whole Numbers
Use estimation to find a reasonable solution to multi-digit addition and subtraction problems. Numbers are less than or equal to 1000. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Other
Nearpod: Adding Within 100
In this lesson on addition within 100, students will learn how to compose numbers and will explore strategies to add double-digit numbers such as vertical addition, regrouping, using multiples of 10, and labeling an open number line.
University of Cambridge
University of Cambridge: Nrich: Adding Plus
On this one page website sharpen your logic and addition skills while working on this challenge. The solution is available to double check your solution.
University of Cambridge
University of Cambridge: Nrich: Super Value Codes
On this one page website sharpen your logic and addition skills while working on this challenge. The solution is available to double check your solution.
University of Cambridge
University of Cambridge: Nrich: Twenty Divided Into Six
On this one page website sharpen your logic and addition fact skills while working on this challenge. The solution is available to double check your solution.
Other
The Math Learning Center: Number Rack
Number rack facilitates the natural development of children's number sense. The movable, colored beads encourage learners to think in groups of fives and tens, helping them to explore and discover a variety of addition and subtraction...
Quia
Quia: Story Problems With Mixed Practice
Your problem-solving skills are put to the test in this interactive word problem game on this site. Employ a variety of mathematical skills and strategies including logical reasoning and computation. Multiple choice problems created for...
National Council of Teachers of Mathematics
Nctm: Figure This: Beating Heart
Do you know how long it takes your heart to beat 100 times? Test your estimation and number sense skills with this problem-solving challenge. A one-page activity taken from the NCTM Math Challenges for Families Collection. Hints and...
Alabama Learning Exchange
Alex: Why Do We Carry the One?
The students will critically think through the traditional algorithm for addition and compare to an alternative strategy.
PBS
Pbs Kids: Cyberchase: Railway Hero
Players are on a mission to repair cyberspace's Information SuperRailway, after pieces of its track were stolen by the villain Hacker. Using math problem-solving strategies including counting, addition, and spatial reasoning, players...
Illustrative Mathematics
Illustrative Mathematics: 3.oa Making a Ten
This task builds on that knowledge by asking them to study more carefully the make-a-ten strategy that they should already know and use intuitively. Aligns with CCSS.Math.Content.3.OA.D.9 Identify arithmetic patterns, and explain them...
Math Is Fun
Math Is Fun: Add Em Up
This is a demo version of the game with two modes of play. In one, you must place number tiles on a grid so that the tiles touching it add up to that number. In the second mode, you solve number puzzles. Be sure to read the instructions...
University of Cambridge
University of Cambridge: Nrich: Ladybugs in the Garden
On this one page website sharpen your logic and addition facts skills while working on this challenge. The solution is available to double check your solution.
University of Cambridge
University of Cambridge: Nrich: Make 37
Sharpen your logic and addition skills while working on this challenge. Solution.