I agree with what's been posted...it seems a bit fishy or odd that he didnt ask students in tech classes. Does not seem logical what's he's doing.

If you decide to do it...be cautious:
1) tell your parents where you'll be and tell them to check in with you periodically (every 1/2 hr?)
2) tell that teacher your parents know where you are
3) DONT go alone...make sure there's two of you and make sure you are together at all times
4) hell...ask him why he's not asking techie students

Go with your instinct...you are obviously a little suspicious/cautious because you asked.

Stay safe buddy!