That site contains lots of material, not just courses. For instance, materials from the Wolfram Technology Conferences.
Much of the content there is timeless, but the technology is dated. Nowadays there is the whole Wolfram Technology stack that is relevant to education. I don't know the official take on all of this but there is this which is for all levels:
http://www.wolfram.com/education/
and this one is mostly for pre-college, right now it appears to just have algebra,
http://education.wolfram.com/index.html.en
and of course there is the Computer-Based Maths initiative which is always worth mentioning in the context of courses involving Wolfram Technologies. And of course there is the Demonstrations website with lots of education-worthy material, any one of which could be a week's worth of course material.