The 'Abraham Lincoln: Vampire Hunter' film would be of interest to a history teacher because the story brings out Lincoln's Indiana childhood in the early 1800s. It is adapted from Seth Grahame-Smith's novel that originates with Lincoln's secret journal. The greater part of the movie is however quite fictional.
As long as you recognize that it's a work of fiction, then it's just a matter of saying "hey, you should check this out!". It's actually pretty well done, as the author did a pretty good job of weaving the fictional stuff, into actual events. I liked it.