sorry can't help u with teachers,though u can post a thread in chit chat lounge regardind that.
let me tell u my experience,actually teachers help u in correct positioning of fingers and rythm
but the real learning is on ur side.
read as much theory as possible.and try to implement it urself
and do not place too much trust in ur teacher.
use classes as a ladder once u know the basics ,pick up on ur own