That is a great list and one I have looked at before. DD16 has applied for a selective program on the list - and the best part is the program is free. Don't know how many apply and won't find out until end of May of she was accepted.
Most programs on the list are for older kids, at least very advanced MS, more likely HS.
My kids prefer not to do much school over the summer, though DD16 took Chemistry at a local private school last summer to fit in other courses during the school year. They have done short programs - a week or two long - but mainly stick to sports over the summer.
