You also might want to read Grace Lewellyn in The Teenage Liberation Handbook, something of an underground classic. She includes her own story, which starts out much like where you are right now--young and idealistic and wanting to be a teacher who does good, not harm. Anyway, you really need to read it if you are going to make an informed decision about your future.
Leslie in KY
ps my unschooled daughter just graduated from Stephens in Missouri. She has a talent with children and would like someday to do some sort of drama program work with kids, outside of the public school structure, of course. There are many avenues for helping children grow outside of the limitations of schools.
And I should add, I am a speech-language pathologist who absolutely will not work in the school system ever again-- and I will tell you that you will have even less freedom as a teacher than I had as a therapist (administration really doesn't give a rip about speech therapy so you do get left alone to a large degree).