This is a 50-page file that contains 6 sets of task cards. They are designed to support a classroom using the red/yellow 2-color chip model of teaching children to represent positive and negative numbers. There are 2 sets of 24-card decks that focus on adding integers (and recording the number sentence and sum), 2 sets that focus on subtracting integers (and recording the number sentence and difference), and then a bonus 2 sets of cards that present subtraction number sentences for the kids to build and solve.
I used these cards with my above level fifth graders as they were first introduced to addition and subtraction with integers. We worked through the cards over the course of a week. The addition model is easier for the students to understand and they mastered it in no time. As we worked through the subtraction model, I realized that they needed more time to work with the chips as the kids needed a lot of practice in representing the whole with extra pairs of chips. After 2 days, I didn't want to continue giving them the picture representation but they still needed work. I created the additional sets of cards that they could still build with chips, but had to practice how to represent the whole and then remove the correct chips. The subtraction problems are definitely more challenging for the kids to understand, and I think that the extra practice was just what they needed.
In past years, I have taught integers with the chips but not with the cards. I usually move to number sentences more quickly. I think that giving them extra practice with the visual representation really helped them grasp what they were actually doing when they removed chips.
Each of the 6 sets is 8 pages long, including 6 pages of task cards (4 per page), a 1-page recording sheet, and a 1-page answer key. I also included a 2 page bonus of half sheets for kids to glue in their notebooks that give a sample problem of each type using the 2-color chips.
I decided to bundle it all together at a discount price because I feel like the set as a whole helped the kids over the course of 4 or 5 days in a way that one set by itself might not have accomplished. I had the students work in pairs as they went through the cards, and then assessed them individually at the conclusion of the week. I could also see kids being ready to skip a set to move to a later set, so this adds the flexibility to do so.