Enter with Integers

Today my Pre-Algebra students reviewed adding and subtracting integers.  Last year they worked with two-colored counters and talked extensively about zero pairs.  The game "Enter with Integers", from Exploring Algebra and Pre-Algebra with Manipulatives by Don Balka, was a great way for them to refresh their memories and get up to speed.  The students did a wonderful job and once we removed the counters and practiced integer problems without the counters, I could see that they really understood how to add and subtract!