Examples of this are:
http://vhslearning.org/summer
http://www.k12.com/content/new-k12/en/virtual-school-offerings/online-private-schools-courses/summer-school-courses.html?adobe_mc_ref=https%3A%2F%2Fwww.google.com%2F
How good are these? Kinda desperate for something to do/classes to take over the summer