Check out this new blog from Bay Area musician Rob Ewing. It’s called Rocketship.
Developing players should from the beginning get used to the idea that all notes are available. Students should be encouraged to experiment with playing any number of notes and note sequences over various harmonic progressions, and get a feel for the way different pitches function on a continuum of relative consonance and dissonance.
You might recognize Rob as the trombonist from Married Couple, who you can hear on Scratch My Brain Podcast #3.