Constant review is so important in Math. With this book of "Pre Class Problems" (PCPs) your students will be constantly reviewing concepts. I have used these in my classroom for years with great success. I start each week by giving my students 1 sheet of PCPs. Each sheet contains 15 problems, which is enough for the entire week. Students begin each class by doing 3 problems for that day. The process becomes routine. I definitely feel using PCPs in my classroom have increased my student's state test scores. Even my students say that the PCPs help them so much on the state test.
Give this a try. You won't regret it.