I've submitted an application to the Application Center: An Epidemic Model (for Influenza or Zombies). This is an interactive Maple document, suitable for instructional use in an undergraduate course in mathematical biology or differential equations, or a calculus course that include differential equations. No knowledge of Maple is required. It explores the basic Kermack and McKendrick SIR model of an epidemic such as influenza, as well as a model that was proposed for a zombie apocalypse.
As always, your comments and suggestions are greatly appreciated.