AEC Daily offers over 250 free continuing education courses on line. The courses generally consist of powerpoint like pages and end with a test which earns a completion certificate and which requires a membership number to take.
The courses include many with green and sustainable themes though plenty have no green element at all. Each course is sponsored and the sponsor's products are featured in the courses though the use does not seem to be excessive. For instance BioBased Insulation sponsors Thermal Performance: Energy Efficiency Through Insulation.
Other courses with sustainable themes include: Cool Roofing: A Solution to National Energy and Environmental Challenges sponsored by the Chemical Film and Fabrics Association, and Green Roofs a Sustainable Strategy sponsored by Hydrotech.