I use the Suzuki method with additional theory instruction from the book Essential Elements for Strings. I adapt these resources and supplement with additional materials and teaching strategies as I see fit. I also use many of the methods implemented by Mimi Zweig for teaching the Suzuki violin songs.
For information about the Suzuki method: https://suzukiassociation.org/about/suzuki-method/
For a look at Essential Elements for Strings, search “Essential Elements for Strings Book 1 Violin” on Amazon.com
For information about Mimi Zweig String Pedagogy: https://www.connollymusic.com/string-pedagogy