Ok now I'm all curious, what are trumpet "grades"? I don't mean the grade of trumpet, like student or intermediate or pro, I mean, like someone on here was talking about studying to pass his "grade 8" test or something, and I don't think he's in the 8th grade in elementary school, I think there are grades of trumpet playing. I'm wondering, is this a Suzuki thing? Or some series of books I don't know about? Or something you do when you're a music major in college?