I made a worksheet for my intermediate students about American presidents. I know that there a lot of texts about them but I don't really like boring texts. So I found that Animaniacs' song is funny and they could get some general knowledge about American presidents. Show video them two or more times, because Animaniacs' accent is difficult for EFL students. You could find video here: http://www.youtube.com/watch?v=Vvy0wRLD5s8