religious school
noun /rɪˈlɪdʒəs skuːl/
  /rɪˈlɪdʒəs skuːl/
(North American English)- [uncountable, countable] a school supported by a synagogue, church, etc. and attended in addition to an ordinary school- She has religious school on Sunday mornings.
 
- (British English faith school)[countable] a school especially for children of a particular religion- The children attend religious schools outside their catchment area.