Music Composition ECs advice for High Schooler

Thank you everyone for recommending Jacob’s Online Composition Academy. My son is doing it this summer and is greatly enjoying the lessons and masterclasses. He is getting some great feedback on the pieces he has composed so far (his mentor teaches at Jacob’s and he said your work could pass off as graduate-level submission I see here) and working on a new one that’s pushing him to try new instrumentation. What would you recommend for next summer? His mentor at Jacob’s said that Berklee summer composition is for beginners and he is already quite advanced. He should look into conservatories in Europe for next summer but I haven’t been able to find anything that will accept someone his age. Would really appreciate any ideas on how I can I support him in developing his talent.