This is a student-drivenTM collective teaching and learning website. Most of the material contained in Rhea has been collectively created by Purdue students and has not been filtered or corrected by a teaching authority. Likewise, the software driving Rhea is the sole responsibility of the student development team. If you have complaints or suggestions for improvement, please consider joining the student development team. Anybody in the world can browse the content of Rhea using a web browser. Anybody with a Purdue career account can edit the content of Rhea. The software running the site keeps track of who writes what and when. This information is available for public view.