Perusall (http://perusall.com) is an educational,
research-based tool that creates a social media platform around uploaded
materials or online materials. Students engage with the material, adding
comments and questions that can be upvoted or commented on by other students in
the class. Perusall can be used with published materials for a fee, but is
completely free to use with open educational resources (OER). Perusall can
automatically score students on their engagement with the material. This
presentation demonstrates how Perusall has been used with an OER textbook
in a introductory physics class.