I would take whatever you can at a Jr College. It is much cheaper. With that said, those classes will take you a full semester, whereas through UTA AP program, they are generally 5, 8, or 12 weeks. I choses based on subject and wether in person would be best for me and time. About the 12 of 16 science hours, it just means that before you can apply for the nursing program, you need to have completed 3 of the science classes (A&P I &II, Chemistry, Microbiology). The 30 prereq hours would be pretty much everything else. You can still need Pharmacology and Pathophysiology but I wouldn't leave much else since it would need to be done before entering the nursing program.