My oldest is finishing book Dd and has used it from book A. This particular ds preferred the layout over Spelling Workout. He really enjoyed the ETC books, so this was a perfect fit for him. I like the alternative words, as well as the alternative homework ideas at the bottom of each lesson if you need more practice. They also have a few blank lines at the bottom of the list so you can add in problem words to the next weeks list. We are in the last book, so we will move on to the Calvert CD in the fall.
HTH,
Jill