Hmmm... If you want to help children from unwanted homes, teaching in the inner city is certainly an option. My significant other is a speech language pathologist who works with pre-schoolers and grade schoolers. The environments that these kids come from in the pre-school is unreal. She loves the little tykes, but also knows at the end of the day many have to go home to terrible environments. I've not seen her in action, but apparently they really cling to her. Perhaps that's a sign that the love for them they find in her makes a difference.

Anyway, point being: You would certainly have the opportunity to work with the disadvantaged and unwanted in the public school systems. It would be hard work (esp. emotionally), but you would also touch lives that way.

What about teaching music and tech/science? (I'm actually surprised you didn't put music down.)