Are theists also suggesting the public schools teach both astrology and astronomy..? How about teaching both alchemy and chemistry..? One is science and the other is not. Evolutionary science is science and ID/creationism is religion dressed up to look like science. This has already been decided by the courts.
Explanation - The US School system, because it is funded by taxes, is a system of the states, and ultimately the federal government. Consequently, it is unconstitutional according to many rulings by the US Supreme Court for the US government to support any religion with tax dollars. There must be, as Jefferson noted, a wall of separation between the two. Religion can be, and is taught in private schools, but the public schools are different. Evolution by natural selection is a scientific explanation for the diversity of life on this planet, and there is no serious debate about it in the scientific community. Suggesting that the ToE and Creationism be taught side by side attempts to make these two positions equivalent, which they are not. Should we also teach astrology alongside astronomy, and alchemy alongside chemistry..? The question is ludicrous.