From Longman Dictionary of Contemporary Englishmagnet schoolˈmagnet ˌschool noun [countable] American EnglishSES a school that has more classes in a particular subject than usual, and so attracts students from a wide area
Examples from the Corpus
magnet school• a math magnet school• In November 1986, the District Court endorsed a marked expansion of the magnet school program.• The plan involved a variation of the magnet school concept. 