Click on the Login/Register link at the top right of the home page. Click on the Create New Account tab and fill in the information. Click on the Create account button at the bottom of the page. There is no charge to register. The next time you come back to the BiblicalTraining website, login by entering your username or email address and password, and then click on the lecture you want. You only need to register once. After that, just login!
When you are logged in, you have access to the links for other resources like notes and study guides that are available for some of the classes.