The IABM Training Academy has posted an introductory online course on 3D. The course takes about an hour to complete and provides an introduction to 3D and how it works for TV and in the cinema. No prior knowledge is required to take the course.

You can find the course at this link: http://www.iabmacademy.org/Online_Courses/3D_Free/player.html

WARNING: the site asks you to go through a simple set-up verification sequence before you enter the actual course.