Michael Medved, a Movie critic, outspoken lunatic conservative, and senior fellow at the discovery institute said everything we need to know about Intelligent Design, when he said:
The important thing about Intelligent Design is that it is not a theory - which is something I think they need to make more clear. Nor is Intelligent Design an explanation. Intelligent Design is a challenge. It’s a challenge to evolution. It does not replace evolution with something else.
Source: The Jerusalem Post, Aug 6th, 2008
There you have it.
Intelligent Design is NOT A THEORY; Therefore it has no business in biology class, since it's not even a theory.
Intelligent Design is not an explanation; Therefore it is not science, since the whole purpose of science is explaining how things work in the natural world.
Intelligent Design does not replace evolution with something else; therefore, it's place in a science class is superfluous and trivial at best.
Intelligent Design is a challenge to evolution; therefore, given the rest of what Medved has admitted, it is a largely UNSCIENTIFIC challenge, carrying no weight whatsoever in the scientific fields, and is strictly a sociopolitical challenge, if anything.
So do we need to waste any more time arguing the subject of Intelligent Design, and whether or not it belongs in science classes?