When we had days like this in school, our science teacher would play poker with us.
And Zapped is not an appropriate movie for a teacher to show students. Some nudity, lots of pot growing on school premises, and Scatman Crothers.
It's probably too late now, but I recommend something like "The Man in the Iron Mask" (Leonardo DiCaprio, Jeremy Irons, John Malkovich, Gerard Depardieu, Gabrielle Byrne) or "Three Musketeers" (Charlie Sheen, Kiefer Sutherland, Oliver Platt, Tim Curry, Chris O'Donnell) or "Count of Monte Cristo" (Guy Pearce, Richard Harris, James Caviezel). None of these are "classic movies." But they are based on classic books (so I guess you can make some argument that they are educational) they have stars who the youth of today might still find relevant, they are exciting, and maybe they will inspire one of your students to actually read one of these books.