I have dropped classes during my school's drop/add period in the first week of the semester. First semester freshman year, I dropped general psychology as a night class, then ended up taking it in the spring anyway, this time as an afternoon class. I also dropped World Regional geography before classes even started, which we can do.

This year I dropped Natural Disasters because the professor gave us a homework sheet that involved calculus (!!!!) in a 100 level class. I was just like screw this; I'm not doing calc in a 100 level if I don't need to, then I dropped out. Plus he hadn't taught in five years. BIG red flag. Then this semester I had to withdraw from The Planets because I was failing no matter how hard I tried. Now I'm behind in my sciences. I just hate science/math. :(

that is really the main reason I chose it...that and the fact that I can be finished with it after the fall...none of the other foreign languages they offer here would have let me do that.

Ah, memories.

In my sophomore year, I dropped 2 classes. The fall semester I dropped a Fortran class and its lab because I just could not program right for the life of me. It counted as one drop, though I could afford two. The spring semester I dropped Physics II with Calculus because I just was not understanding anything anymore.
I retook it without calculus in my junior year.

In my senior year, I dropped Food Microbiology. I was taking 5 classes that semester and did not really need it anymore. Plus I did not do well in one test because it was requiring too much memorization.

I had started a Masters program in Biotechnology at the same school where I got my Bachelors degree, but changed out of it to Science Education. After changing majors, I dropped an Infectious Diseases class. Too much homework- and I would not need it anymore.

Funny how I had to dig deep into my brain. These are not things I think about often.

And in Library School, which is what I usually mean when I talk about graduate school here, I did not drop anything. In fact, I aced all classes but one. Shows you how much can a field that you truly enjoy and that matches your strengths can make a difference in how motivated you are in achieving well in it.

I dropped a seminar on Muslim-Christian Relations. It looked VERY interesting on paper, but was WAY too much work. I peeped the syllabus on Day One and was like hell to the no.

I think I withdrew from a French class Sophomore year because I was sick of the Cafretz method (French in Action) and wanted to hold out for a section that was taught traditionally.