Reply To: how to get better
I agree with John. Join your professional organizations and go to the conferences and workshops they offer. Pick the minds of your peers. See what works for them and apply it to your situation and style of teaching. Invite guest conductors in to your classes and watch them work with your students. Also, learn to make constructive criticism work for you. Put your groups in situations where you will get feedback on your work and then use that feedback to improve your teaching style. Best Wishes!