"Theories"...?

Creationism doesn't qualify al all in any way as a theory in the scientific sense. It is more like an invalidated, disproven hypothesis (in the scientific sense). That is why it is highly inappropriate to teach any form of creationism in a science cl. Intelligent Design is just the latest fad version of creationism that will fall by the wayside in the popular press very soon, just like "creation science" did.