So on my application to PT school I need 2 LOR from PT's and 1 LOR from a professor. The 2 PT's I can easily ask my boss and her assistant to write me but the 1 LOR from a professor is a tricky one. I went to a large university where the average class was 100+ for all the science classes. There was one class that I fairly did well and gotten to know the professor on a decent basis, but that was almost 3.5 years ago in my sophmore year. Should I just ask a professor that I received an A that I recently took? How likely are professors to write you a bad LOR if they don't really know you, but you have a good grade?