As the article states, "The main weakness in the idea of an intelligent designer is that it is impossible to see it as any sort of explanation of the phenomenon it purports to illuminate." ID does not really constitute an alternative explanation of the development of species. It is simply a critique of evolution and, as such, it only makes sense within the context of a discussion of evolution. But, in principle, it is a valid critique of evolution - it was first introduced by Darwin himself in The Origin of Species, chapter 6. Like Darwin, I find this critique unconvincing. But I see no harm in introducing it in the classroom, as long as it is presented as a critique of evolution (which it is) rather than as an alternative theory (which it is not).
Man shot dead in northern Israel town of Bi'ina, police say the murder was gang related (Haaretz)
from the article: The absurdity of intelligent design