One thing I've noticed on these threads is that people seem to think that subjects in school should never overlap. Whether or not ID is scientific really shouldn't be the point. Math is used in science class. English is used in science class (writing papers). Reading is used in science class (reading the textbook). Even History is used in science. The point is, subjects are not exclusive and they cross over into each other's territory. Even if ID is viewed as being philosophical rather than scientific, that does not mean that it cannot be brought up in a science class.
Junk science (astrology, spoon-bending, psychic channeling, ID, creationism, etc.) never belongs in science class. Junk science has no overlap with any other academic subject -- except abnormal psychology.