I love using the GRASPS model, and I include a link to a helpful site if you are interested in using it, too. In short, the G is for goal for the student, R is the role of the student, A is the audience of the student, S is the scenario that is real world, P is the product or performance the student will create or product, and S is the scoring rubric you give to students before hand so they know your expectations.
Here are a couple of pics from one of my performance tasks so you can get an idea of how unique the products are, and you can imagine how engaged students were! Same performance task. Totally different outcome. Want to know what their task was? Head on over to my blog post! These are great for allowing students to express their creativity and get away from mindless worksheets ---> "Worksheets don't grow dendrites." -Marcia Tate. One of my favorite sayings!
I hope you will hop on over to my blog and share some of your ideas and thoughts!