www.guardian.co.uk/teacher-network/teacher-blog/quiz/2013/feb/04/grammar-punctuation-quiz-test
Am relieved I scored 14 out of 14, since I am a Literacy cordinator!
I only knew what a gerund was because I remembered it from the English Language unit I had to study for my Lit degree - not sure it is of much use to your average 11 year old, really.