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Lesson Plan
Curated OER

Introduction to Estimation and Making Arrays

For Teachers 2nd - 3rd
Students explore the concept of estimating and organizing a group of objects into an array to count the exact number of items. They create their own arrays and practice elements of estimation.
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Worksheet
Curated OER

Using Arrays

For Students 2nd - 3rd
For this multiplication worksheet, students analyze a grid array and use the grid to show the multiplication fact and answer 6 questions.
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Lesson Plan
Curated OER

Basic Multiplication Facts - MathKeys Software

For Teachers 3rd - 4th
Students explore multiplication concepts.Ā  In this multiplication lesson plan, students define "array" and draw several arrays to represent multiplication number sentences.Ā  Students construct arrays on the computer using MathKeys software.
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Lesson Plan
Curated OER

Relating Multiplication and Division

For Teachers 3rd - 4th
Help the class determine missing factors in equations by creating arrays. Through modeling and practice, they come to see the inverse relationship between multiplication and division. As an assessment, individuals build their own array...
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Lesson Plan
Curated OER

The Commutative Cookie

For Teachers 3rd
Learners illustrate multiplication problems using Unifix cubes. Some very nice attachments are present in this tasty lesson which uses baked goods to illustrate an array.
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Lesson Plan
Utah Education Network (UEN)

Pattern Search

For Teachers 3rd Standards
Pupils identify and define various mathematical properties, such asĀ the commutative properties of addition and multiplication, and the associative property of addition. They also reason and communicate mathematically by making...
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Worksheet
Curated OER

Relating Multiplication and Division R12-7

For Students 3rd - 5th
Learners utilize an array to assist them in completing four multiplication and division math problems.
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Lesson Plan
Curated OER

The Squares of Numbers in Multiplication

For Teachers 2nd - 3rd
Review multiplication facts and concepts! This clear, and easy to follow instructional activity will help your class to understand multiplication by using arrays and repeated addition. There are strategies to help with memorization and...
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Worksheet
Curated OER

100 Hungry Ants

For Students 2nd - 4th
After hearing the story, One Hundred Angry Ants, learners apply what they have seen to a math challenge. They choose one of three numbers: 12, 24, or 36. Imagining this were the number of ants going to a picnic, they consider how many...
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Lesson Plan
Alabama Learning Exchange

Finding Prime

For Teachers 5th - 7th Standards
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...
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Lesson Plan
Code.org

Processing Arrays

For Teachers 9th - 12th
Scholars use a playing card activity to help them develop a program to find the minimum value of a list. They learn to use for loops to write code that will process lists.Ā 
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Interactive
Khan Academy

Challenge: Favorite Animals

For Students 6th - Higher Ed
I'm not scared of lions & tigers & bears; in fact, they are on my favorites list! Have your young coders practice creating arrays and using loops. First they define the array as a list of favorite animals, then print them out...
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Interactive
Khan Academy

Challenge: Constellation Maker

For Students 6th - Higher Ed
Populate your own universe with constellations and stars. Modify the existing JavaScript code to use the pushĀ method of arrays, and mouseX and mouseY to draw a star based on the click and position of the mouse.Ā 
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Worksheet
Curated OER

Arrays

For Students 2nd - 3rd
In this math worksheet, students examine 12 arrays and write the multiplication problem that corresponds with the picture. There are no examples.
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Worksheet
Curated OER

Multiplication of Whole Numbers

For Students 3rd - 5th
Break up multiplication into more easily conceptualized math operations. Scholars first examine an array of apples and write a multiplication sentence to represent it. Then, they determine which of four sets of addends is equivalent to a...
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PPT
Curated OER

Multiplication Review

For Teachers 3rd - 4th
Review the various ways we multiply. Multiplication is presented as repeated addition, equal groups, and in an array. This is a quick way to go over what we do when we multiply and may be a good tool for a beginning of the year review.
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PPT
Curated OER

Unidades y Decenas

For Teachers 2nd
Using examples of numbers less than one hundred, this presentation in Spanish provides a visual representation of arrays. It would be a great way to help learners understand the concept of tens and ones.
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PPT
Curated OER

Chocolate Bar Math

For Teachers 1st - 4th
How many ways can you use a chocolate bar to engage mathematical reasoning? This slideshow gives you seven to choose from. Part/whole, fractions, counting, and using chocolate bars as arrays are only a few. Note: This is a presentation...
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Worksheet
Curated OER

Count the Objects

For Students K - 1st
Wow, that's a lot of stars! Learners count 101 stars from an array of five rows. This resource would work best projected since the explanation is on it. Also, if you do this as a whole-class problem, you can have pupils share strategies...
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Worksheet
Curated OER

Multiplication of Whole Numbers

For Students 3rd - 5th
Rather than simply have your scholars memorize multiplication facts, be sure they understand the process behind each equation. There are four arrays of objects here; mathematicians write a multiplication sentence for each. Next, they...
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Lesson Plan
Curated OER

Division by Fractions (Part Two)

For Teachers 4th - 6th
Investigate division through the use of array models. The lesson focuses on using area models to compare division as sharing with division as grouping. Students evaluate the usefulness and limitations of the two array models.
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Lesson Plan
Curated OER

Skipping Into Multiplication

For Teachers 3rd - 4th
Young mathematicians study the relationship between skip counting and multiplication. They build on skip counting skills and examine arrays while studying multiplication. Resources are provided.
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Lesson Plan
Curated OER

Solar Kit Lesson #13 - Solarize a Toy

For Teachers 7th - 10th
Physical science or technology classes will be invigorated by this challenge: to convert a toy, game, or other device to run on solar power. In doing so, they will design theĀ appropriate solar arrays. This is an A+ lesson, complete with...
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Lesson Plan
Curated OER

"Just Cruising"

For Teachers 4th - 6th
Practice writing the same number sentence in a variety of ways. Learners will explore math cruise ship problems to write equivalent sentences. Then complete word problems which have been included in multiple languages.

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