Hi, recently I started a notes/revision wiki for A-Levels.  It's been
growing a fair amount recently so I thought I'd post a link here:

http://wikinotes.cdpuk.net

For those that don't know what a wiki is: It's basically a site where
anybody can edit the content, adding and removing whatever you want.

We're on about 300 'real' articles, it currently covers a lot of
mathematics, physics, biology and psychology with smaller amounts in
other subject areas so far.  Hopefully some of you will find this a
useful resource - any maybe even add your own notes to it ;)  There's
loads more information on the main page.

- Chris