Harvard has a significant number of summer classes that are available to high school students. They offer a two week Pre-College program, and Four-Week and Seven-Week Secondary School (SSP) Program classes. In my opinion, the two week Pre-College classes are not worthwhile, but the SSP programs classes are. They also offer college credits, since they are actual Harvard classes taken with Harvard undergraduate students. There are many excellent classes offered in both the four-week and seven-week versions. To qualify, you must be at least 16 years old by June 20, 2026.  Use the link below to check out the class is being offered for the summer of 2026.