I took every pre-req except for CNA class (no longer a pre-req) at Rio Salado, including A&P. It is extremely thorough and very well-run. You use a virtual dissection CD-ROM that provides very detailed info on the human body. Also, for each section you will receive a type of outline of the concepts you will need to teach yourself. I will warn you though - it is much, much harder than taking it in person. For example, you will be given a link to "Key Words" that you should know. That list will contain every single bolded word from your textbook. In other words, there is no one giving you a hint what to study for the exams. Everything that you are required to learn is "fair game" on the exams. If you are a conscientious student - that is frustrating, and you will probably spend lots of time trying to memorize everything. In a classroom setting, you will be guided by an instructor as to what is important and what is not. In fact, I find actual nursing school
easier than the Rio online classes for that very reason. The instructors basically teach what you will be tested on.
I felt the Rio classes prepared me extremely well except for one thing - I have terrible medical pronunciation because I never actually heard many of the terms spoken outloud (too used to reading them). If you are disciplined - give Rio a shot. But take my word and read other Rio posts on this forum - it is often much, much harder than what you will find in a classroom, and people who try to cram often have terrible results.