(Screenshot from RADCAB website)
As part of our Library Instruction programme at ESA we work with students on evaluating the quality of information available on the web. We teach something called the CARRDSS Approach, but there are many other systems (and acronyms) out there.
One really neat little one that I have recently come across is the RADCAB acronym. The creation of a school library Media Specialist, RADCAB comes with a great little website. Bookmark this site for easy reference.