my3boys, actually that is what the three middles are all using this year. My second oldest (10th) using the HS American history, and the two next dd’s using the younger version of American history. We had strayed from SCM this year and I’m really looking forward to returning next year. Our thoughts: it’s a long time to spend on history each day. If you do the whole program, as written, it says it should take 2-3 hours, I believe. They were getting pretty burned out on the subject (even though it incorporated vocabulary, writing, literature, etc.), it was still on the one subject with the one book open. I did find it useful to help my hs’er take notes each day so she was more prepared to answer comprehension questions. But about a month ago, when I decided I would be returning to SCM, I began altering using the program to be more CM friendly. No more comp. questions and typical quizzes. Written narrations instead and skipping most of the assignments. Working much better now.
For next year, my (then 11th grader) will need World History, so I have been wracking my brain trying to think of how I could skim through the 6 SCM modules and figure out a one year program, but I may just break down and get her the Notgrass World History. She has liked it well enough and I would recommend it; as far as textbooks go, it’s more of a narrative than most. Not too overly burdened with facts and dates. Great photos. But, my first choice would be SCM for next year, if I can figure out a plan. 
Hope this helps!
