This activity is a great activity to use as a review/practice. For the teacher it allows you to see who is instantly getting it and who is still struggling. My kids LOVE it! It has them up and moving around the room as they work to solve problems.
Simply print out the sheets as is, mix them up and then tape up around the room. (If you laminate them they will last even longer!) Review sessions lasts about 20-40 minutes depending on your students.