When I first got into league, I knew nothing about how to play various (duh) (the difference between bruisers and carries, what CC was, etc.).
I found it incredibly frustrating that I had to learn a little bit at a time, learn more about the game to then continue searching, all on my own (TEH BUTTHURT I HAS IT).
Please include a list of relevant third party websites somewhere accessible to new players (login screen/the play button area?).
Such websites I would recommend include:
lolwiki about general mechanics and item/champion details
mobafire's LOL for build guides
championselect for champion counterpicking
solomid for build guides
elobuff for paid access to better stats about ranked
surrender@20 for LOL rumors