When Dylan Wiliam says something like that, I pay attention! But I didn't find the linked paper easy to digest/apply, and I struggled a bit to see what the BIG DEAL was.
BUT this blog post from Dan Williams helped me quite a bit.
The post walks through the theory with an emphasis on how teachers might USE cognitive load research to help students learn. I get to teach a graduate class in the "Psychology of Teaching" and this might turn out to be a "centerpiece" of the class...
posted by Rob McEntarffer