These are a great way to differentiate your assessment at the end of your volcanoes and earthquakes chapter! Students choose from an A project, a B project, or a C project. The higher the potential grade, the more work they must put into their project. I've had fantastic results with these, and my students enjoy the change from the "normal" test taking at the end of the chapter!
Included here is an overview page to give students, as well as specific rubrics for each project.