I should have read this 20 years ago when I started teaching piano instead of now when most of her advice feels like reminders of the obvious, minus a few things I disagree with. There’s a few bits that feel like they would have been better advice 20 years ago, like requiring students to purchase a paperback music dictionary (why when there is Google?) and making printing professional business cards the first and most important thing for setting up a studio with a bare mention at the end that some teachers find setting up a website to be helpful. It’s 99% timeless, though! Highly recommended to aspiring or beginning piano teachers, moderately recommended to experienced teachers.
This book leans heavily toward “classical” piano teaching. It is chock full of very useful ideas and procedures for piano teaching. I especially appreciated her practice suggestions, her group lesson suggestions, and the many specific examples she gave for everything throughout the book.