Michigan Math and Science Scholars
Michigan Math and Science Scholars is a summer research program for current high school students at the University of Michigan. The program is offered in two 2-week sessions and students can attend one or both weeks. The courses are drawn from the UM College of Literature, Science, and the Arts. The classes are small (15-students) taught by UM professors and other outstanding instructor. There are both residential and commuter student options.
One 2-week session runs $1100 for a commuter student and $1850 for a residential student in 2014. Attending both sessions costs exactly twice this rate.
You can find out more here: http://www.math.lsa.umich.edu/mmss/