As stated, church and state is a nessecity, especially in today's day and age. If we, as in america here, did not have this, we would be a truely ignorant country. Ofcourse, there is still alot of christian ideals within the government (see britian for true seperation) but its a start.

Creationism should in no way be taught. There is no sort of science backing it up, so it could not be taught along side things like Chemistry or Physics that have actual proofs.