It's been discussed on FR at some length in the past. It's not without its flaws but it's a good solid text.
My other suggestion for a supplemental resource would be for you to get hold of OLD back numbers of American Heritage magazine -- best place to look is your local college or university library, or abebooks.com.
You want to get back before the early 70s, when long time editor Bruce Catton (yes, that Bruce Catton - of A Stillness at Appomattox fame) had died and his protege Oliver Jensen left the magazine. It went into softcover and not only got all politically correct and sloppy, it started repeating itself.
The text of all the articles is online at the American Heritage website -- but the real strength of the magazine is the marvelous illustrations and maps which are NOT on line. Maybe they will put out a DVD that will include all the pics (you could write them and ask). I have all the hardcover issues back to when it was The Journal of Local and Regional History or some such title, back in the late 40s.
It is especially strong in Civil War (naturally, given the editor), but also in Revolutionary War as well as political history. Catton was a liberal in the old sense, but he was a good historian and an honest man.
Also consider the possibility of teaching from original documents, if you have the time. That was the most fun I ever had in history class.
We loved A Patriot’s History of the United States, too. We used the Sonlight curricula in addition to the REA CLEP US History books (I & II). Our daughter got great scores on the CLEP tests using that material. I cannot say enough good about the Patriot’s History.