Thinking about this from a self-interested pov, I could see the intersession as a hardcore rehearsal process
In the summer going from 9-3, I can put up a show in about 3 weeks
But I could see the benefit of having a regular after school rehearsal period and the intercession would be tech week and performance
A lot of arts could have this ‘work on craft over 6 weeks, then have an intense week or two to finalize projects and performances