Catholic schools share in the preferential option for the poor that is an essential part of following Jesus and the mission of the Church. Catholic schools in many parts of the world have an historical and contemporary mission for the care and education of the poor. This article uses key passages from the Gospels of Luke and Matthew to illustrate that Mary can be understood as an exemplar of God's preferential option for the poor. Mary is presented as a young and poor Jewish woman of faith in the Annunciation and the Magnificat in Luke's Gospel and is presented as an externally displaced person in flight into Egypt in Matthew's Gospel. The paper also examines the journey to Bethlehem in Luke's Gospel as interpreted by Pope Francis. He interprets this as Mary being an internally displaced person. Adopting these distinctive modes of interpretation, Mary can be recognised as a model of the preferential option for the poor for Catholic schools.