St. Mark’s is a college-preparatory boarding and day school, grades nine through 12, located upon 250 acres in Southborough, Mass., just 25 miles from the cultural opportunities of Boston. The School’s outstanding faculty — 75 in number — lead 338 students through a challenging curriculum and a full program of co-curricular activities, fostering a close community. St. Mark’s engages and motivates talented students of diverse backgrounds, emphasizing excellence, character, and service to the larger community. Class size averages 10, with a student-faculty ratio of five to one. Most departments offer Advanced Placement courses, as well as independent study opportunities that have ranged in topic from building a submarine to studying ancient Latin through primary sources.