However, you are missing one key difference here, Darwin's Theory of Evolution is a Scientific Theory, Intelligent Design is nothing but a cloaked attempt to disquise Religious Doctrine as Science.
BTW, Taxes, Evolution Theory IS Science. ID Is NOT.
However, We'll Teach Both as Science until the day the Sun, the Moon, The Stars, and the Rest of the Galaxy cease orbiting the Earth...
After that we'll revert to a System that Teaches Science Theory in Science Class, and Religious Theory in Sunday School...
Won't be any classes after the Sun the Moon and the Stars and the rest of the galaxy cease orbiting the earth. School will be out, permanently.