The class that changed my life had to be 11th Grade US Government with Mr. Clevenger. One of the smartest teachers I have ever had. It was one of the few social studies classes in high school that challenged me at all. It made me extremely aware of how our government works and got me to really follow politics. After being in his class, I knew I wanted to do something with politics/international relations in college (going to James Madison College at MSU) and for a career.

Actually, it wasn't really the class so much as it was my teacher in 8th grade Honors English. I never got higher than a B on any of my writings in that class...even though I thought they were darn good.
She was a great person, my teacher and a friend. But she did deny me her request to have me place in Honors English for High school. She told me if I wanted it, I'd have to take the exam and get placed.
Boy, I worked my butt off on that exam to make it the perfect paper..and I got in. And I realized that if you want something, you really really gotta work for it.

the class or classes that have changed my life were my 8th grade English class and my current psychology class.
My 8th grade English teacher had us write essay after essay at least 3 a week including 3 drafts each, i know it doesn't sound like its hard but he came up with some crazy ideas, i hated him when i had his class but now after i look back on the class i learned alot from him and the writing, i learned that i can write about anything no mater how stupid or unimportant it is and that has helped me so much in my classes.
My psych class has taught me so much about myself what i have learned about myself i can use with other people
ah, i just remembered my science teacher in 9th grade was a biochemist before he started teaching, he quit his job because of a personal stand, the company was putting products that were sub par on the the market, and he took a huge pay cut and drives almost 2 hours to school to teach. he taught me so much about really cool aspects of science and technology
i Guss i didn't really answer the question because there have been so many classes that have inspired me so much isnt it great how much one teacher can do for you in a year or less

Without learning Qbasic and C++, I wouldn't be a programmer on my team. Would I? Heck, I probably wouldn't even be on this robotics team!

Algebra II Sophmore year, got me into FIRST.

Video Production, because the teacher gave me keys to the school, declaring me "Audio/Visual technician for the school. I got an office, keys, alarm code, and fixed all electronic devices around the school.

Physics, because we built a Trebuchet, Potato Cannon, rocket bike (which was actually ridden around), and generally explored the coolness of how realistic a class physics is.

:D