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Multiplying and Dividing Integers
I've got some great tips for teaching the rules for multiplying and dividing integers . These three tips focus on discovery, making sense of the math, and extending reasoning. Teaching this way will help your middle school math students retain the rules of multiplication of integers. Also, if you don't want to make your own products to help your students, I've got some for you below that will make your life easier.

Give them a multiplication chart similar to the blank one below and a calculator.

Have them use their calculator to complete the multiplication problems. Color the positive products one color and the negative products a different color. After students have completed their multiplication chart have a conversation with open-ended questions such as: What patterns do you notice?

Before using number lines to teach the rules of multiplication of integers, I always talk about thinking of multiplication as "groups of" then translate the problem into words.

Now, you can't actually have a negative group of something. In the case of a negative first, students can think of this as the opposite, and bounce to the opposite number on the number line.

-5(2): The opposite of 5 groups of 2

-5(-2): The opposite of 5 groups of -2

Tip 3: Extend their thinking

After they have a good grasp of opposites, and how opposites cancel each other out. Extend their thinking by determining the product or quotient of more than two integers. The best way to do this is with 1's, so they are not wasting their time on actually multiplying, rather just the signs. You could give them a list of problems like the one below, and have them notice the pattern. Even number of integers = positive, and odd number of integers = negative. Have them explain why this is true. You could even throw some ones in there, to show that will not effect the sign of the product.

All of the above tips focus on the product of integers. Make sure to extend this to division. Again, use open-ended questions to help your students make connections.

How are multiplication and division related?

How can you convert a multiplication problem into a division problem? (i.e. divide by 2 = multiply by 1/2

OK...So there are my tried and true tips for teaching the rules for multiplying and dividing integers.

If you don't want to make your own resources for teaching integers, I've got you covered.

The integer operation notes cover all the four operations of integers. They teach using number lines, which are all pre-made in the notes. They also include additional practice for the students. Include great in-depth questioning to get your students critically thinking. Click on the image below for more information. OR CLICK HERE TO CHECK THESE OUT ON MY MAKE SENSE OF MATH STORE.

Save these tips and ideas to your favorite classroom Pinterest board. Come back and reference them for ideas on how to teach multiplying and dividing integers.

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Teaching Multiplying and Dividing Integers

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I develop curriculum for middle school math. I focus on using critical-thinking skills in my content so the math makes sense to the students.

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Multiplying Integers (learnalberta.ca)
You may use counters to help find the sums.

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how do you divide integers using manipulatives - Bing video

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multiply-divide1.pdf (mathworksheets4kids.com)
Teaching Multiplying and Dividing Integers - Make Sense of Math
Multiplying Integers (learnalberta.ca)
https://www.bing.com/videos/search?q=how+do+you+divide+integers+using+manipulatives&qpvt=how+do+you+divide+integers+using+manipulatives&view=detail&mid=39FB832F152B6A0DE8E639FB
in-out-box1.pdf (mathworksheets4kids.com)

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When multiplying integers using manipulatives, the first integer is used to determine if groups of integers are added or removed. A positive first integer means ADD groups of integers. A negative first integer means REMOVE groups of integers. The second integer is the number of objects in each group. The answer to the multiplication question is the number of objects left over.
Watching videos on using manipulatives for division.
We may use counters to help solve the sum of the problems.

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3rd Grade
3.OA.4 Determine the unknown whole number in a multiplication or division equation relating three whole numbers, with factors 0-10. For example, determine the unknown number that makes the equation true in each of the equations 8 × ? = 48, 5 = ? ÷ 3, 6 × 6 = ?