Sorry barbarianmum that wasn't a dig at you - its something I have seen come up on other threads. In answer to your question no problem with carol singing (no different to Puff the Magic dragon really, just stories with a nice tune). Also no problem with Nativity presented as an Xmas related story, would have an issue if it was presented as historical fact as as some sort of historical reenactment.
I think my issues are (and this thread is really helping me figure this out):
-the non-separation of church and state - but nothing I do as an individual will impact this, as a PP said, it would take a revolution...So putting that aside...
-Anything that says religion is fact, a God does exist. So praying is out, as is bible stories being presented as historical fact (I'm picking on Christianity as school has links with local CofS minister etc, applies to any religion)
-Anything that implies that not being Christian makes you a lesser or bad person. So phrases like instilling Christian values/morals aren't great.
-I think attending a service would be ok, if children were thoroughly briefed beforehand as it being an example of how some people express beliefs, and that praying not required, as opposed to it being something everyone does.
-Peer pressure can be a bugger. When I started in P5 at a non-denom school I remember the shame if being the only person in the class who did not know the lords prayer. Lords prayer was said every morning, grace at school lunch prayers at assembly, and taken to church for major Christian events. Learning about other religions involved visiting all the churches in the town...