Thanks for your reply :). I know disclosing your stutter is a very personal decision and a hard one. Regarding people in general, you can take your time and start with the people you are closest with and who you trust. With professors, however, I did it because I thought the following: "Most of them don't know me and I'm sure they will have forgotten about it after a day or two. I also worked very hard in learning for this test/working on this project/preparing this presentation and I deserve to be judged by what I say, not how I say it. If I don't tell them, it's not always very clear that I have a stutter because it's not very severe and the blocks may seem as if I don't know the topic I'm talking about or I forgot the contents of my talk, which may reduce my grade unfairly. So what the hell, why not tell it anyway?" I have not told a lot of professors yet so I can't generalize, but my gut feeling tells me that 99% of them would understand. You have to be a really bad person AND professor if you don't. So I'm glad you are considering doing the same as I did and I wish you the bests of lucks!