I asked 3 teachers for a rec letter so that I could choose the best ones out of it. I know I'm handing one of them for sure, but I'm having a problem choosing between the other two. One of them is from my AP Calculus teacher, and from what I hear, her rec letters are pretty generic and unspecific. It's just not something that would impress the admission officers. The other one is from a teacher I've known for the past two years from extracurricular activities, but the problem is, I haven't taken any of his classes. I heard his rec letters are really good, probably much better than my math teacher's. He writes specific stuff that he saw/experienced with the student, and I'm sure it's going to be more helpful for the admission officers to get an idea of what kind of student I am.