7 Moral and Religious Education in all Schools Feeling very keenly the weighty responsibility of diligently caring for the moral and religious education of all her children, the Church must be present with her own special affection and help for the great number who are being trained in schools that are not Catholic. This is possible by the witness of the lives of those who teach and direct them, by the apostolic action of their fellow-students, but especially by the ministry of priests and laymen who give them the doctrine of salvation in a way suited to their age and circumstances and provide spiritual aid in every way the times and conditions allow. The Church reminds parents of the duty that is theirs to arrange and even demand that their children be able to enjoy these aids and advance in their Christian formation to a degree that is abreast of their development in secular subjects. Therefore the Church esteems highly those civil authorities and societies which, bearing in mind the pluralism of contemporary society and respecting religious freedom, assist families so that the education of their children can be imparted in all schools according to the individual moral and religious principles of the families.
Source: Gravissimum Educationis (Vatican.va)