Judging by the pages we could preview and other reviews we ordered "up" a grade -- using the 1st to 2nd Bridge Book for my son who will be entering 1st grade. (The K-1 book is too too easy). The pages are perforated, so I tear out 5 pages each week and place them in his "homework folder" and they are due to me on Fridays before we get an ice cream cone. He keeps the folder in the car and gets quite a bit done there. There are some things he needs help on because they weren't covered yet, but he is able to grasp them easily after a brief explanation from me(like identifying a noun or compound word or less than/greater than symbols). They can be done in 10 minutes/day, even with some teaching of new concepts, and he is making sure he doesn't lose any skills this summer as well as getting "ahead" a little. Our summer program involves this book, Doch sight words the school sent home, and he reads a chapter a night from a Magic Tree House book. Perfect amount of work for the summer months.