It is not a science. I think it would be interesting for children to be taught about the belief structures of many peoples from around the world. Set aside a class for that. Not to brain wash but to educate and help them learn about the world they live in and the many types of people that inhabit it.
I DO NOT think it should ever be taught in a science class room especially not alongside evolution as though "It's either this or that, pick one". It would be ridiculous. The scientific method has been used to create one and not the other.