summer skills set and we love them. In fact, I order them every summer for each of the kids. Unlike other books , these are not predictable, they draw on many different skills, and the kids enjoy doing them. We spend 15-30 minutes a day working on these and I try work on them at least three days a week. For this set, you buy the grade you just completed (not the grade you are going into). They help to back-fill, and strengthen the skills they have learned so they start school with a solid base.
You can order these at www.summerskills.com