Phillips Academy Andover (also known as Phillips Academy, Andover, or PA) is a highly selective, co-educational preparatory high school for boarding and day students in grades 9–12, along with a post-graduate (PG) year. The school is located in Andover, Massachusetts, United States, 25 miles north of Boston. The school has 1,122 students, and is part of the Ten Schools Admissions Organization.