I use the Trinity College London syllabus for classical and electric styles. For younger students I usually begin with The Guitarists Way, a beginners guide that prepares them for the Trinity syllabuses. However, there’s no obligation to use a pre-designed syllabus, and many of my students work from a custom design that fits their learning style. It all depends on your goals, how you like to learn, and what kind of music you like. I make a point of teaching students the music they want to learn so that they’ll want to pick up their guitar and play.