From Longman Dictionary of Contemporary Englishsummer schoolˈsummer school noun [countable, uncountable] SESSECcourses you can take in the summer at a school, university, or college
Examples from the Corpus
summer school• We then went to a summer school in general relativity at Cornell University in upstate New York.• And then he was leaving for the Devon summer school.• Harvard summer school would have been a tantalizing experience for her.• Families travel to Los Angeles for intensive summer school sessions.• Booming attendances during the summer school holidays brought in an extra £500,000 at the turnstiles.• The change will add an estimated 33,000 new students to the summer school rosters, which last year reached about 200,000. 