Apologia! That afternoon, I walked into our local academic bookstore to browse...and they had Apologia on the shelf! So, I forked over the credit card before I could think about it ...again. I'm really glad I did, because he's already read all of the first "module" and completed the "On Your Own" questions. We just want the credit, so I think this will do the job for him. Of course, just one program is not enough ... so I ordered Thinkwell Bio off Ebay too.
Campbell's sounds impressive and I probably will order it anyway for my 7th grade daughter who is very capable. She complains when things aren't hard enough! I just got scared that for my ds, there would be no teacher, and I'd have to pull it all together. Apologia is written with that in mind - it's all taken care of for me. As for any philosophical differences with the curriculum - I figure what a great time to explore both sides of any debate. We have Holt, so we can throw in some evolutionary theory, as vague as it is, and have a great lesson on comparing sources at the same time.
Anyway, the only good curriculum is one you actually use! We're already "into" Apologia, so my fingers are crossed that we keep it up! Thanks for all your discussion, and, I'm looking forward to how you do with the "Pre-Baby" Campbell.