If you’re on the West Coast, three summer jazz programs for 13-17yo musicians worth considering (listed from north to south):
- Stanford Jazz Workshop
- Colburn Summer Jazz program
- Idyllwild Jazz in the Pines.
My son did Stanford and Colburn multiple summers and they were VERY formative in his development and eventual success in college auditions. We also know people involved with Idyllwild and know that is also well-regarded and has great faculty.