I take some news headlines (mostly from CBBC Newsround, simplifying them where necessary depending on the level of the class) and put them onto PowerPoint to use for the last few minutes of the class. Two examples I used are below from the week ending 20/04/12 (answers are 'sun' and 'famous' in no particular order.) Students call out their ideas, maybe one side of the class against the other and hopefully have a laugh.
Big risk for young people who are _____
_____ cream doesn't work.