Then each group draws an integer from a hat to add or subtract to their market value. We draw as many rounds as possible in 40 minutes and reward the team who has the highest market value in the end. After students learn to add, subtract, multiply, and divide integers, we play Integer Concentration to review and practice. On a grid on an overhead projector, I mix up expressions and their corresponding answers. I cover each grid square with a slip of paper.
Students take turns uncovering pairs of squares to find a match.
Or what happens if someone else jumps on with your friend. Then I give students three colors of dots to represent positive numbers, negative numbers, and variables. Then I have them work through several two-step equations to solve for the variable dot. To assess students, they were asked to make rectangles that had a perimeter of 24 inches. Some made their rectangles with tape on the floor while others constructed them on paper.