Is it weird that I passed my daughter's teacher a note with my email?

Not at all. But lets hope this relationship cause his job.

Other than that, have fun

I don't see a problem, everyone need love even teachers =P chance are chance, its better to go for it rather to miss and regret.

I don't think that's a problem at all. Often the first moves in a dating situation are awkward and uncomfortable, but they are always "right" if they work.

And maybe it's a natural impulse toward teachers. I worked as a teacher for a while and had neighbors hitting on me, including someone who placed a note under my windshield wipers. Also, I think some of the kids keyed my car, but that wasn't really a friendly note.

Don't sweat it - even if it seemed a little high school-ish, it's nothing more than a bold move. Those usually yield good results. If I was the teacher in question, it would be fine with me.