This book is terrific! My son used it for 2008-9 schoolyear. We did not use (nor did we need) a teacher edition--the book is so well-written, and we had no "this is busy work" grumbles, because the problems were examples of how the skills would be used in real-life situations. Not having the teacher edition, I also solved all the problems in order to grade David's work, but he appreciated that, and I "passed", too! Just an excellent book, and it also meets WV standards for 6th grade math. My daughter is using ACSI next schoolyear for 1st grade, and son will have ACSI jr. high, too.