This is a large poster that shows the basic rules for adding, subtracting, multiplying and dividing Integers. It is ready to have printed out and laminated. It can also be easily resized if it is too large for your needs.
It would be a good way to channel students' focus when talking about different civilizations or eras. It breaks a huge idea down to six different topics, with varying complexities. It could be altered a little to be more applicable.