My son has high functioning autism and math has always been where he has the most challenges. I just started using this curriculum this year and can't express enough how pleased I am with this product. There is much review, which has helped with his retention. I also like that there are so many word problems. The other curriculum we were using only used them sparsely. So far, we have had multiple word problems with every assignment and I have noticed that he is doing better in figuring out how to do them independently. I will definitely be using Teaching Textbooks from now on.
We used this only for 7th grade, as we had gone through the Strayer-Upton Practical Arithmetics books until then. I loved the economy and quaint-ness of the Strayer-Uptons, as well as their portability and good old-fashioned arithmetic, but the Teaching Textbooks sure did take a load off of me! My kids loved the instant feedback and explanations. You actually don't even need the write-in worktext, since you are doing the exact same thing on the computer, which keeps track of everything for you (you can print records out, if you wish). The workbook is redundant until after TT 7, at which time everything is done in the worktext and not on the computer-- in other words, after TT 7, you only get the lecture on the computer.
I highly recommend the Teaching Textbooks series, with one caveat: in my opinion, they are one grade behind. However, things are explained a lot better than they were when I went to school, and since we homeschoolers aren't trying to race to the finish... no big deal. This program is such a time saver, it's fun and interesting, and kids just love it.