MacMillan Dictionaries have had a really good web presence for a while now, with plenty of accessible articles for A level students (and normal, everyday people who are just interested in language).
One of the best and most useful features for A level English Language has been its Buzzwords section, a weekly feature in which the ace lexicographer Kerry Maxwell takes a look at a new word that's appeared and explores its origins, formations and uses.
It's exactly the kind of thing that feeds into the work we do on Language Change for ENGA3 (or ENGB3 if you follow the AQA B spec) and provides the kind of up to date and well-referenced examples of words and word formation processes that can make your essays on this topic a much better read, and keep you topped up with new and original illustrations.
Buzzwords is now ten years old, so Kerry has written an overview about what's happened in the world of new words, which you can find here. We'll be looking at this in class in the run-up to the exam in June, but it's definitely worth having a read now and looking back through the Buzzwords for 2012 here and the archive here.