I'm interested in taking some advanced classes in pharmacology, physiology and pathophysiology. I really enjoyed the hard science aspect if nursing school and prerequisites, and am toying with the idea of CRNA school somewhere down the line. I read that taking these classes is a good way to prepare and can also strengthen your application, but I'm also interested in gaining more in-depth knowledge in these subjects for the sake of having that knowledge. The trouble I'm running in to is that schools I've contacted in the area do not offer these classes a la carte- you have to be enrolled in a degree program to take them. Does anyone know of schools that offer classes like this online without requiring matriculation in a degree program? I know they must exist but so far I haven't had much luck finding any.