Does Manhattanville College offer any courses for high-schoolers?

Yes, they do have a fine summer academy for those high school students who have completed their sophmore year by June 12 of the current year in which they wish to enroll. Students can earn college credits in a wide variety of courses all while getting a taste of campus life. Apparently there are special discounts available and the school suggests contacting the Office of Summer School directly for more information.