1. Montessori Mountain Schools ⇒ a network of Montessori Catholic schools in Poland
2. Sternik (Helmsman) ⇒ (a network of) single-sex, uniformed Catholic school(s) in Poland
3. Mother of Divine Grace curriculum
4. Puer Iesus College ⇒ England
5. Regina Caeli Academy
6. Regina Caeli Academy U.K. ⇒ England

Organizations

1. European Association of Single-Sex Education (EASSE)
2. Initiative für Christliche Bildung