Difficult class

I have had a few difficult classes throughout my college years. I hated chemistry...I just couldn't get it. I had to take two semesters for my Associates in Biology.That was probably the worst class that I had to take. I also had to take a history II class. The class was packed full of information, although it wasn't hard. I think the biggest problem there was that I wasn't diggin' the class at all. I wasn't into it, so naturally it made the class harder.  Another one was a basic physics class for radiation therapy. I had to take classes online, and it was pretty hard for me to grasp the concepts. I passed the class, but I am glad that I don't have to take another one.