Actually, the kids we know that attended summer school did it in order to be best prepared. As prepster said, they are using the facilities at the school with advice from the strength coordinator. A large number of the incoming freshman were there, so they held there own voluntary practices, thus bonding and honing their skills. I know a few attended WWBA 18u prior to summer session, as summer schedule is abbreviated. They only took 2 classes, so they got adjusted to the classes while having plenty of time to be baseball ready. I think this is becoming more common.