- Academy of Our Lady
- Academy of the Holy Names
- Academy of the Sacred Heart
- Alcuin Montessori School
- Alvernia High School
- Archbishop Moeller High School
- Archdiocese of Omaha Catholic Schools
- The Avery Coonley School
- Bateman School
- Bellarmine College Preparatory
- Berkeley Preparatory School
- Bernard Zell Anshe Emet Day School
- Bethlehem High School
- Billings Area Catholic Education Trust
- Bishop Noll Institute
- Bishop Ward High School
- The Bolles School
- Bordentown Military Institute
- Boylan Catholic High School
- Brady High School
- Brebeuf Preparatory School
- Breck School
- Bridgemont High School
- Brookstone School
- Brownell-Talbot School
- The Bush School
- Carmel Catholic High School
- Casady School
- Catholic Memorial High School
- The Catlin Gabel School
- Chaminade Julienne Catholic High School
- Chiaravalle Montessori School
- Charles Wright Academy
- The Chicago Academy for the Arts
- Chicago City Day School
- The Colorado Springs School
- Christ Church Episcopal School
- Christ School
- Convent of the Sacred Heart
- Convent of the Visitation School
- Countryside School
- The Cove School
- Cushing Academy
- Darlington School
- The Dayton Early College Academy
- Delbarton School
- Derham Hall High School
- The Discovery School
- Divine Savior Holy Angels High School
- Dock Mennonite Academy
- Edgewood High School
- Elim Christian School
- The Ensworth School
- Forest Ridge School of the Sacred Heart
- George Stevens Academy
- Gibault School for Boys
- Gilmour Academy
- Girls’ Preparatory School
- Glen Oak School
- Grand Rapids Christian Schools
- Greenfield Hebrew Academy
- The Harbor School
- Harpeth Hall School
- Hathaway Brown School
- Hawken School
- Hillcrest Lutheran Academy
- Hill-Murray High School
- Holland Christian Schools
- Holy Angels Academy
- Holy Cross High School
- Holy Cross School
- Holy Trinity Parish School
- Howe Military School
- Hutchison School
- Illinois Mathematics and Science Academy
- Immaculate Heart of Mary High School
- Jesuit High School
- John Burroughs School
- Kalamazoo Christian School Association
- Kemper Hall
- Lakeview Academy
- Langley School
- The Latin School of Chicago
- Laurel School
- Lexington School
- Living Word Lutheran High School
- Lourdes Academy
- The Lovett School
- Loyola Academy
- Luther High School North
- Lutheran High School Association
- Luther Preparatory School
- Marian Heights Academy
- Marian Central Catholic High School
- Marian High School
- Marist School
- The McCallie School
- McDonogh School
- Mercy High School
- Meredith-Dunn School
- Michigan Lutheran Seminary
- Mother Theodore Guerin High School
- Mount Carmel High School
- Mount Michael Benedictine School
- Mount Notre Dame High School
- Mount Saint Joseph High School
- Muskegon Christian School
- Nardin Academy
- Network of Sacred Heart Schools
- Newman Central Catholic High School
- North Shore Country Day School
- Notre Dame High School
- Notre Dame High School for Boys
- Notre Dame Preparatory & Marist Academy
- Oklahoma Christian School
- Orange Lutheran High School
- Oregon Episcopal School
- Palmer Trinity School
- Phoenix Country Day School
- Pius XI Catholic High School
- The Prairie School
- Racine Lutheran High School
- Rehoboth Christian School
- Roeper School for Gifted Students
- Roncalli Catholic High School
- Roycemore School
- Sacred Heart Schools
- Saint Agnes School
- Saint Bonaventure Preparatory School
- Saint Ignatius College Prep
- Saint John’s Preparatory School
- Saint Scholastica Priory
- Saint Thomas Academy
- Saint Xavier High School
- Salisbury School
- San Antonio Academy
- Sandy Spring Friends School
- Sayre School
- Siena Catholic Schools of Racine
- St. Andrew’s-Sewanee School
- St. Bede Academy
- St. Benedict High School
- St. Benedict Preparatory School
- St. Francis High School
- St. Francis School
- St. Ignatius High School
- St. John’s School
- St. Luke’s Episcopal School
- St. Mark’s High School
- St. Mary’s Episcopal School
- St. Mary’s Ryken High School
- St. Scholastica Academy
- St. Scholastica High School
- St. Ursula Academy
- The Episcopal School of Los Angeles
- Totino-Grace High School
- Trinity High School
- University of Detroit High School
- University Liggett School
- University School, Milwaukee
- University School of Nashville
- Ursuline Academy
- V.J. and Angela Skutt Catholic High School
- Villa Duchesne/Oak Hill School
- Wahlert High School
- Walden School
- Webb School of California
- Western Michigan Christian Schools Association
- Westminster Christian Academy
- Woodland Presbyterian School
- Woodlands Academy of the Sacred Heart
- Woodward Academy
- Xaverian Brothers High School
- Xavier High School