Grammar
Celebrating 25 years of Raymond Murphy's grammar books, Foyles in London has this display: September 2010. The book may have been a good one 25 years ago, its approach and contents do not accord with 21st century thinking on grammar. It is a pity that it has not yet been supplanted.
Graphic courtesy of Moura School (http://www.mourass.eq.edu.au/functional_grammar.htm)
BBC Learning English: Grammar Challenge
Click here for definitions of grammar.
See also this blog entry: Shibboleths