The Continuing Education Office in partnership with Cambridge Educational Services is happy to offer this test-prep class online:

The GRE online prep course has 30 self-contained 1-hour units with lessons, practice workshops, and tests. The lessons cover secret insights into the GRE including testing mechanics, fully explained answers and unique problem-solving strategies. Students learn step-by-step instructions for approaching each section of the test and have untimed workshops and timed practice tests to build confidence before test day.

Students have 5 months (from registration) of unlimited access to complete the 30-units.