This PPT is a great review of all cases of adding integers. It starts off with a familiar addition problem that only includes positive numbers and builds from there to conceptually (through patterns and the use of a number line) show how to add a positive addend to a negative addend, a negative addend to a positive addend, and finally, a negative addend to another negative addend. Complete with teacher notes, use this as a whole-class or small group activity, or assign it to students who need a