Phillips Academy ( also called Andover , Phillips Andover , or PA ) is a high school for boys and girls in Andover , Massachusetts , near Boston , USA . Phillips Academy ( also known as Phillips Andover , Andover , Phillips Academy Andover or PA ) is a co-educational independent boarding high school for boarding and day students in grades 9 â `` 12 , along with a post-graduate ( PG ) year . The school is located in Andover , Massachusetts , 25 miles north of Boston .