teachers, educators
- Catherine of Alexandria
- Francis de Sales
- Gregory the Great
- John Baptist de La Salle
- Ursula
- other saints and beati who were teachers include
- Abbo of Fleury
- Abibas
- Adalbero
- Adelard
- Ado of Vienne
- Adrian of Canterbury
- Agatha Lin
- Agathangelus Nourry
- Agrecius of Trier
- Albert of Sicily
- Albert the Great
- Alberto Hurtado Cruchaga
- Aldhelm
- Alexander Sauli
- Alfons Maria Mazurek
- Alfredo Ildefonso Schuster
- Alphonsa of India
- Ambrose of Milan
- Ambrose Sansedoni of Siena
- Anatolius of Alexandria
- Andrea Carlo Ferrari
- Andrea Giacinto Longhin
- Andrew Bobola
- Andrew Ishchak
- Angelus Agostini Mazzinghi
- Angelus of Furci
- Anne Mary Javouhey
- Anselmo Polanco
- Anthony Baldinucci
- Anton Martin Slomsek
- Arnold Janssen
- Arnold Reche
- Arsenius
- Augustine Novello
- Augustine of Hippo
