This series of workbooks was exactly what we needed to supplement our math program. The series of four workbooks begins with the most basic concepts relating to fractions, then builds systematically upon a solid foundation. By the end of book 4 the student should have a great deal of understanding and confidence in dealing with fractions. It is easy to understand, easy to teach, easy to grade, and economical. Most importantly, my two sixth graders who HATED fractions and would give up on any problem dealing with them, now no longer fear fractions and tackle fractions with confidence and clarity.
I have used booklets from the Key series (fractions) for both my 4th and 5th grader, in addition to their standard math lessons. They are simple to complete, not overwhelming, and have nice explainations. A fantastic resource for the basics. I am planning on using the other topics as well. As a note these are great for... times when you need a break from the normal school math routine, summer to keep those minds working, and for travel. I am so thankful we found them! And an obvious, but important factor to most...the cost! Fantastic!!