Go here:
http://sustainabilityworkshop.autodesk.com/how-register#ProCourses

Click this link to go direct to course registration page:
http://sustainabilityworkshop.autodesk.com/courses/www/

Free courses:

To register to take the Autodesk Building Performance Analysis (BPA) Certificate on your own, you can use the following key:
BPAC-v1.0-no-instructor