i don't remember how much this costs... but for me, depending on what i'm trying to learn, i can go either the self-taught route or needing a teacher. I actually do best when i have an instructor to show me then make me accountable for doing it myself.
For those of you with apple stores in your neighborhood, doesn't apple also have free classes to teach smaller groups how to use the programs and such? I remember there was place on the apple site to find this and sign up at a local store...