Poly Prep Country Day School (known familiarly as Poly Prep) is an independent school with two campuses in Brooklyn, New York. Poly Prep's Middle School (5th to 8th grades) and Upper School (9th to 12th grades) are located in the Dyker Heights section of Brooklyn, New York. Poly Prep's Lower School (Nursery to 4th grade) is located in Brooklyn's landmarked Park Slope neighborhood.