Recommended Sites for English: EnglishBiz

I recommend http://www.englishbiz.co.uk/ for anything to do with English.

It combines many sites about English, like BBC Bitesize (which is useful as well for English, and other subjects as well) so you can find everything you need about English. But not necessarily how to spell pneumonoultramicroscopicsilicovolcanokoniosis! Yes, it is a real word!