ChemPad lets your students enter chemical notation that includes correctly formatted subscripts, superscripts, and reaction arrows. What's more, chemPad provides chemically aware scoring and hints that help your students identify mistakes in their responses.
Marvin JS lets your students answer questions by drawing chemical structures and reactions that are scored automatically. You can also use Marvin JS to display chemical structures in your questions using a variety of modes, including ball-and-stick drawings that your students can rotate in 3 dimensions to view from any angle.