One of my all-time favorite things to teach is integer operations. I have built a few activities and games that make teaching integers a snap! I even made a couple of cute little videos (I say that sarcastically because I HATE myself in pictures haha.) Here are a couple of links to past blog posts I made about integers.
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Here is the post on adding and subtracting integers! Enjoy!!
Here is the post on multiplying and dividing integers!!