Reason is the greatest enemy that faith has; it never comes to the aid of spiritual things, but - more frequently than not - struggles against the divine Word, treating with contempt all that emanates from God.
That, in a nutshell, is why schools should be teaching the historical, social and cultural significance of various religions and not be promoting them as any kind of truth. Children get more than enough of that at home and at their places of worship. It is rather unlikely that churches, mosques, etc. would agree to hosting introductory classes for young ones in principles of secular humanism, cosmogony, epistemology, and so on, so why should schools agree to foist religion on youngsters? Other parts of the syllabus are not open to the dictates and wishes of parents or school governing bodies so why should religious instruction be allowed a special dispensation? And how will a school guard against the inevitable marginalising and ostracism of minorities by the majority based purely on respective creeds, an effect that could do much harm?
Schools are supposed to equip youngsters with sufficiently acute critical faculties and for this aim, religious practices, engaged in as truth, are counterproductive. They have no place in schools. None whatsoever.
'Luthon64