There is no need to enroll in individual classes. They are available at no charge. Just click on the title of the class and then the lectures for that class. All the classes are recorded so you can listen anytime, at your own pace. We offer certificates for a few of our courses for which we charge an enrollment fee to cover some of our costs of the additional resources and to send you a printed certificate.
You may view the classes you are working on by clicking on the "person" icon on the home page, then on the My Progress link.