This is a good site to help students remember that all sentences need an ending punctuation.  Also on this site there are two other great games that practise making sentences that make sense and the other one creates interesting sentences too. http://www.bbc.co.uk/schools/starship/english/penguinsonice.shtml This is the link to access and it is also located at the bottom of my teacher's page on the second page of WEB LINKS.