The Advanced Placement Computer Science curriculum has used case studies since 1995. For the 2008 examination, the APCS curriculum introduced the GridWorld Case Study. Students who have grown up in a world of computers want to be able to do something more exciting than compute the average of a list of numbers or the price of an order in their initial programming class. GridWorld allows students to manipulate animated graphical objects before they even know how to write a line of Java code. It provides an early introduction to methods with and without parameters. Students can easily see the inheritance chain and start extending classes in a natural way almost as soon as they start programming.
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