Originally Posted by Val
Added to the question: do they have homework? or are the camps just science-y during the day, with activities otherwise?

At http://cty.jhu.edu/summer/grades7-12/intensive/catalog/faqs.html they write

Quote
How much work will be expected?

CTY students work hard. They spend seven hours a day, five days a week, in class sessions. Our students enjoy academic challenge and rigor, and we design our course work to engage and inspire them. If students feel overwhelmed, the residential, instructional, and administrative staff are all available to help with time management, organization, and study skills.
which I would interpret as no homework on top of the 7 hours a day of class, but this should be confirmed by CTY or by past students.