Member schools.

The Advent School; Bancroft School Beaver Country Day; Belmont Hill School; Boston College High School; Brimmer & May School; Brooks School: Buckingham, Browne & Nichols School; Cambridge School of Weston; Cape Cod Academy; Chapel Hill-Chauncy Hall School; Charles River School; Commonwealth School; Concord Academy; Cushing Academy; Dana Hall School; Dedham Country Day School; Derby Academy; Falmouth Academy; Fay School; The Fenn School; The Fessenden School; Fontbonne Academy; Gann Academy; Governor Dummer Academy; Groton School; Hillside School; Landmark School; Lawrence Academy; Maimonides School (Elementary); Meadowbrook School; Middlesex School Milton Academy; Mr. Alvernia High School; Nashoba Brooks School: The Newman School; Newton Country Day School; Noble & Greenough School; Notre Dame Academy--Hingham; Notre Dame Academy--Worcester; The Park School; Phillips Academy Andover; Pingree School; The Rivers School; Roxbury Latin School; Sacred Heart High School; Shady Hill School; Shore Country Day; St. John's High School; St. John's Prep; St. Mark's School; St. Sebastian's School; Tabor Academy; Thayer Academy; Walnut Hill School; The Wheeler School Whitinsville Christian School; Winsor School; The Woodward School; Worcester Academy; Xaverian Brothers High School.