A Google A Day is a fantastic way to test your (and your students) search engine skills. Each day, a challenge is presented where finding the answer will take a little more searching skill then your everyday search. The site uses a ingenious system that searches the web as it was the day before the A Google A Day challenge was given, ensuring that you don't stumble across spoilers.
Many students think they are good "Googlers", but often they are just scratching the surface of what search engines can offer. This short activity can be used as a great transition activity, discussion starter, or even class competition to compare times. You can even embed the challenge as I have below to highlight the day's challenge on your class website.