Right or Wrong?

You want to know whether it's right or wrong to have a crush on your math teacher?

Well I don't think that it's right or wrong.
It just is.

This isn't really a question of morality.
This is about feelings of sexual attraction -- something that we have little control over. You know?

When it comes down to right or wrong,
it's about what we choose to do with these feelings.
It's about how we choose to behave.

First off, how old are you? I don't think it's wrong. I used to have a crush on my 8th grade Algebra teacher (God, he was so beautiful) but it was just a crush. I can't really give you a full answer to this without knowing your age because my answer can differ.

It's kind of hard to tell based on the info you've given us.... but I'm gonna try to give you some pointers to think about it yourself.... do you know if he's single, or if he's available at all? do the two of you ever talk in a more personal/friendly way, or just for school-related stuff? what would he think of the age difference? since he's older, he might be looking for a more serious/stable relationship than you're ready to offer as a student with a lot of possibilities for change. what would the repercussions be at your school, is it against the rules?
If you think about all that stuff and you still think it could work, I'd advise you to wait until he isn't teaching you anymore. Once you're done with his subject(s), you can keep talking to him outside of a class setting and go from there. But if you're underage, there's nothing to do but get over him, sorry.... I've had a friend in that situation and it ended badly both for them and for the teacher.

I had a crush on my Choir teacher when I was in High School, but I never told him or did anything because I was too shy and he was married. He still is. He left two years after I started high school, and I still miss him. My best suggestion to you is maybe tell him when your high school career ends despite he might not feel the same way. At least you won't go crazy keeping it after four years. However, perhaps at the end of the school year, in case he leaves early in your high school career for a new job, you should let him know how you feel, again, despite that he might not feel how you feel. It's kind of morally wrong that you have a crush on a teacher, but it's not a crime.

I really hope you don't feel like I'm judging you, because I'm really not, but I feel like student/teacher relationships should stay purely student/teacher or friendship. Otherwise things can get very complicated very quickly.

Ummm... This is a tough question, but here goes.
I think you need to look at your teacher in tons of different ways, like ask hi if hes in a relationship or ask him something personal. Also, dont mean to burst your bubble, but its against the law for teachers and students to date. Sorry!