Hi Austechies There is a great online tutorial about using apostrophes at the bottom of the Apostrophe Protection Society's home page (http://www.apostrophe.org.uk/) - where it says "Now CLICK HERE <http://www.writing-kit.com/apostrophes/index.html> for a fun way to check your knowledge of apostrophe use!" You can then test your knowledge and revise apostrophe use by clicking the link "Afterwards why not consolidate your knowledge HERE <http://www.writing-kit.com/ApConsol/index.html> ". Have fun Kath Collins Katherine Collins, PhD, BSc Technical writer & editor ... 15 Tamar Avenue, George Town, Tasmania 7253 Ph: 6382 2016 <mailto:eandkcollins@xxxxxxxxxxx>