Didn't know there were other teachers in Illmuzik... I'm a high school math teacher-to-be aiming to become a university teacher (I already teach some classes and help teachers in their researches). To me, high school was nice, not spectacular, but alright. I liked the maths and science classes, but hated history and everything where you had to learn stuff by heart.
I think that a teacher has way more weight than people can imagine in a teen's life. I mean, if you think about it, here, in Quebec, Canada, a student is in school 5 days a week from 8:30am to 3:00pm... Parents usually come from work tired and exausted around 5:00pm to 7:00, if they are commuter (I think that's how you say it... living in the suburbz and working in the city)... and kids usually go to sleep around 11:00... so teachers are with the students longer and when they are still awake and full of energy.
That period in a teen's life is where he becomes who he will be later on, and, most of the time, he's at school, with teachers!
That's my opinion, of course, but I think that, as a teacher, you got to set an exemple. I chose to be a math teacher because I know that maths results plays a big part in the choice a teen can make in what he wants to do later on (and, of course I also love maths...)... and it just so happens that I dont strictly talk about maths in my classes. I talk about technology, science, actuality, philosophy... everything to make them think, so they can see school as, not only a place where you have to perform to have grades, but a place of learning...
That said, to me, if one student comes to me saying that, because of me, he know what he wants to do with his life, that's terrific!
On another tip... I heard by a US teacher that passing grades are not always 60% in exams... I heard that in florida, you can pass with 50 or 40% in a math exam.... is there any truth to that?