If you have access to it, check out "the well-tempered piano teacher." It is a wonderful book and it may give you some ideas.
Also, get in contact with Karen Taylor at Indiana University. She specializes in teaching piano pedagogy to pianists and if you are serious about the field, you would benefit from establishing contact with her.
Also, check out the Golandsky Institute. They have a certification program you may be interested in.
Good luck!
P.S. Where are you?