Here's a fill-in-the-blank foldable for your middle schoolers! It can be a great review tool or reference tool for the rules for Operations with Integers. Use it whole class or in a math center.

Some of the references on this foldable are from two videos:
MC Santi's Integer Rap and PBS Math Club (Subtracting Integers)
You can find both videos on youtube.
MC Santi:
https://www.youtube.com/watch?v=q2IW9FolSnc

PBS Math Club-Subtracting Integers:
https://www.youtube.com/watch?v=FsxXltuUFQM