This edX course from Georgetown University addresses "the history of ideas about American Sign Language (ASL) with research that has been done on the structure, learning, and historical change of ASL and other sign languages." This course is instructed by Ted Supalla, a professor of Neurology, Linguistics, and Psychology at Georgetown, and is designed for students with all levels of experience and expertise in ASL. All lectures in this course are given in ASL, with an accompanying voice recording for students who are not fluent in ASL. Topics covered in this course include common misconceptions about ASL, the historical development of ASL, the syntax and grammatical structures of ASL, and more. As with all edX courses, users may choose to audit this course for free or they can enroll in the course for credit for a fee. Much of the content in this course will especially appeal to students and researchers who study linguistics, learning sciences, and neuroscience.