I have loved using the free practice app that comes along with each book in the Bastien New Traditions series for on-line teaching! It is providing students with a musical model to follow at home when practicing and during lessons! I am asking students to have it available during lessons. A great exercise for teaching a new piece has been to have students listen to the piece on the practice app while watching their music and counting aloud. Students are hearing a great recording of the piece in real time while I'm with them so we can address questions and get started together on new music.
Also, Kjos.com is offering the e-books for Bastien New Traditions for an incredible price of $1.99 each right now!