If you are a currently enrolled student in one of our Master's programs you can register for summer courses on GWeb, as you would register for courses in a Fall or Spring term (courses requiring department/instructor approval will still require an RTF to register). GW offers an array of courses over the summer, and the schedule can be found here.
Taking a course over the summer is a great way to pick up a few extra credits, but you should do so with caution. Summer courses often cover the same amount of material that would be covered in a fall/spring term over a shorter period of time. You should expect the course to move at a fast pace and plan to dedicate significant time outside of the classroom to complete course assignments and readings.
Also remember that during the summer term the Registrar considers 6 credits to be full-time and 3 to be half-time.
Registration for Summer 2013 classes opened March 1.