Activity
Curated OER

Connor and Makayla Discuss Multiplication

For Teachers 5th Standards
The commutative property of multiplication applies not only to whole numbers but to fractions as well. Connor and Makayla explore and discuss the idea that 2/3 x 3 is the same as 3 x 2/3. Your 5th grade class will connect with...
Activity
Illustrative Mathematics

Comparing Products

For Teachers 5th Standards
How can 5th graders show understanding that 30 x 225 is half of 60 x 225 without completing the computation? They can use an area model and draw it out. An array, or an open array, is an area model that allows for young learners to...
Activity
Curated OER

Choosing a College

For Teachers 9th - 12th Standards
How can mathematics help scholars choose a college? High schoolers learn how they can use decision matrices to rank colleges based on selected criteria. They also see how to weigh criteria using multiplication of the decision matrix by a...
Activity
Curated OER

Measure the Gardens

For Teachers 3rd Standards
Understanding arrays is very similar to understanding the relationship between multiplication and area. Give your third graders an opportunity to practice identifying area models that relate repeated addition and multiplication. They...
Activity
Math Cats

Math Cats: Explore the Multiplication Table

For Students Pre-K - 1st Standards
Create multiplication fact arrays using this tool. Click a number on the side and then the times symbol. Now click a number along the top and the equals symbol. The array appears in yellow. The answer in digits is shown at the bottom of...
Activity
K-5 Math Teaching Resources

K 5 Math Teaching Resources: Number Story Arrays [Pdf]

For Students 2nd - 3rd Standards
A number story activity for students to practice addition of equal groups and multiplication.
Activity
Illustrative Mathematics

Illustrative Mathematics: Counting Dots in Arrays

For Teachers 2nd Standards
This activity addresses CCSS 2.OA.C.4 where students count dots in an array using repeated addition. This skill lays the foundation for an understanding of multiplication.
Activity
Quia

Quia: Multiplication Tables 1 12

For Students 3rd - 8th
Practice multiplication facts using a matching game.
Activity
Quia

Quia: Multiplication Tables 1 12

For Students 3rd - 8th
Practice multiplication facts by playing Concentration-like game.
Activity
K-5 Math Teaching Resources

K 5 Math Teaching Resources: Multiplication Arrays [Pdf]

For Students 3rd - 5th
Practice multiplication by two, three, four and five.
Activity
OnlineMathLearning.com

Online Math Learning: Addition and Arrays (Grade 2)

For Teachers 2nd Standards
A list of suggested activities for addressing CCSS 2.OA.C.4 where students work with arrays and repeated addition. Includes a problem for a 3X5 array and its solution in a video. [8:23]
Activity
Beacon Learning Center

Beacon Learning Center: Groups of Dogs

For Students K - 1st Standards
Students solve multiplication problems using arrays in this interactive web lesson.
Activity
K-5 Math Teaching Resources

K 5 Math Teaching Resources: One Hundred Hungry Ants [Pdf]

For Students 2nd - 3rd
This is an activity for exploring arrays after reading the story One Hundred Hungry Ants by Elinor J.Pincze.
Activity
Shodor Education Foundation

Shodor Interactivate: Factorize 2

For Students Pre-K - 1st Standards
The resource consists of student notes, instructor notes, and an interactive activity. The activity allows learners to find the factors of a given number and then draw the product as the area of a rectangle on a grid.
Activity
University of Cambridge

University of Cambridge: Nrich: Napier's Bones

For Students 3rd - 8th Standards
Use this one page website to learn how to multiply and divide a "new" way. This method was invented over 400 years ago by John Napier. A detailed explanation is only a click away.
Activity
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Distributive Property Illustrated

For Students 6th - 8th Standards
This is part of a math forum at Drexel University. A student gets frustrated when asked to solve a problem using the distributive property. Never fear. Dr. Math to the rescue! Illustrations and detailed examples help provide...

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