Religious school Source: en.wikipedia.org/wiki/Religious_school
A religious school is a school that either has a religious component in its operations or its curriculum, or exists primarily for the purpose of teaching aspects of a particular religion.
A school can either be of two types, though the same word is used for both in some areas:
Institutions solely or largely for teaching a particular religion, often outside regular school
Institutions providing general education but run by a religious group, or in some way giving extra weight to a particular religion