Below are some games to help you.
Don't forget to try Ghost Blasters and post your score here - if you do, you'll get a chance to show your skills in class on Wednesday!
http://www.oswego.org/ocsd-web/games/Ghostblasters1/gbcd.html
http://www.mathopolis.com/questions/q.php?id=956&site=1&ref=/ordering_decimals.html&qs=956_957_1334_1335_3593_3594
http://www.amblesideprimary.com/ambleweb/mentalmaths/fracto.html