Valedictorian is the title to the highest graduate from a school.
Jean-Luc Picard was a valedictorian. (TNG: "Family")
Harry Kim was a valedictorian In 2368, Elizabeth Lense became valedictorian of her graduation class from the Starfleet Medical Academy. Julian Bashir was salutatorian. (DS9: "Q-Less", "Explorers")