In my high school physics class we had one day where we were to learn about reading maps (um, it was not AP physics...)
So the teacher -- a sharp guy -- gives us this map of Southern California and has us read off various things. I do some measuring and, behold, it's forty miles from Glendale, CA (where I went to high school) to San Luis Obispo (where my grandparents lived).
Now, my family drove that trip fairly often, about 4 hours each way -- road signs saying something like 220 miles or so. Thus, something felt fishy about the map... So I go up to the teacher and point all this out, mention my personal experience travelling up the gorgeous Pacific Coast for long hours.
And the teacher says something like:
No. That's it. Forty miles. As the crow flies.
And he makes a little crow-flying-in-a-straight-line hand motion to illustrate.
So I retire to my seat thinking that might be plausible -- then a bit later it starts to sink in that it's only plausible if the crow flies through hyperspace or has been toking serious quantities of Melange, or something.
Anyway, it was probably one of the most valuable lessons of that class: not only can textbooks and class handouts be demonstrably wrong; but also, otherwise smart people will believe things that actual, real experience (and common sense) proves false, so long as those things are written down.
And, to finally bring this around to my contemporary point: maybe it's not so bad if students get taught Intelligent Design in high school science classes. Start cultivating that suspicion of authority early and maybe sell a few more Pink Floyd albums.