I was only taught about Christianity at school, nothing else, perhaps because I come from a Christian country, where the Queen was head of said religion.
I used to sing at Christmas nativity play's, us kids thoroughly enjoyed it..
It is a sad day if my country stops such events because of other religious stuff...............????
In secondary school, the Church of England boys had to be present to sing Christian songs, the Catholic boys were lucky, they could sit in a room and do nothing, or the previous days homework....