Check out these lists of summer programs for high school students around the country.
American Mathmatical Society
http://www.ams.org/programs/students/high-school/emp-mathcamps
Teen Ink Summer Programs Page
http://www.teenink.com/Summer/
MIT Summer Programs for High School Students
http://www.mitadmissions.org/topics/before/summer_programs/
Women's Technology Program @ MIT
http://wtp.mit.edu/
National Institute of Health Summer Internship in Biomedical Research
http://www.training.nih.gov/student/sip/
