I haven't had the opportunity to teach much about integers, or about how to add or subtract positive and negative integers, but I might get the chance this year. It isn't in our current curriculum, so it's an extra topic that we don't normally get to spend time on. However, we will be teaching integer concepts next year, as we work on Common Core implementation....and maybe, just maybe, we'll get to work on some integer concepts at the end of this year. Even though I don't get to teach this topic, I do have a large number line with positive and negative numbers posted in my room, with the hope that the kids will observe it and think about it. And, from time to time, when we talk about the idea that the Commutative Property does NOT work for subtraction, we will refer to the number line (that I have to be on tiptoe to reach!) to see that a problem like 7-2 = 5, but 2-7 = -5. So, we do have that visual to discuss from time to time. In preparation for next y...