This is a site dedicated to teaching about rationality, logic, Bayesian reasoning, cognitive biases, the scientific method, etc. Its all written by a guy named Eliezer Yudkowsky, an autodidact who is working on creating an AI that has self awareness and the ability to improve its own intelligence.
http://wiki.lesswrong.com/wiki/Sequences
Its very enlightening, I spent the past 2 days reading through the first few sequences and I feel smarter already.
He has also written some fiction which is pretty decent at explaining some of these concepts, the lulziest of which is a Harry Potter fan-fic, found
here.
Comments
I like the physics example
EDIT: Im looking forward to the 'words' section