This is a great website, curated by one of my colleagues, Kevin Michael Jones. The site contains articles, audition song lists, educational resources and more!
(in alphabetical order)
Learning Theatre Studios: PreK-8
Learning Theatre Ensemble: Grades 3+
Musical Theatre Ensemble: by audition
Signature Conservatory: Ages 14-18
https://www.sigtheatre.org/education-and-learning/for-students
(in alphabetical order)
Grades K-5
Grades 6-11
https://www.fcps.edu/academics/summer-learning-programs/camps-and-institutes-institute-arts-ifta
Debut - One-week Summer Camp: Ages 11-14
Stage One - Two-week Musical Theatre Intensive: Ages 14-17
https://www.sigtheatre.org/education-and-learning/for-students