Be glad you're not being taught history of things from the books I went to grammar school with. I kept many of them but lost track of them over the years. One taught that the south didn't lose the war, that's just what the yanks teach since they make all the school books which is nonsense since Texas has always seemed to dictate what goes in school text books, anyway.
The question you have to ask yourself: does my science book reference any non-biased sources? If it does, well, perhaps there's some teuth in it, if it doesn't...
-Nam