Oscar-nominated actress Margot Robbie is in negotiations to executive produce and co-star in the New Line comedy Fools Day from writer-director Cody Blue Snider, Collider has learned. The feature is based on Snider's hilarious 2013 short film of the same name, which follows a classroom of nine-year-olds who have to clean up a gruesome April Fool's Day prank before a D.A.R.E. representative arrives and the jig is up. The kids are the real stars of the film, though Robbie is in talks to play a key supporting role -- their teacher. …