Sporcle - Possible Education Tool

One of my favourite ways to eat up a few minutes when I'm taking a break is the website Sporcle, which contains thousands of entertaining, educational games on basically every academic topic taught in schools, and allows you to compare your results to everyone else who has played the games. Here are a few examples of games in my areas of interest:

Periodic Table of Elements
Multiplication Table
High School Math Grab Bag
Anatomy of the Heart

I think this site has quite a lot of potential for use by educators. Teachers could use a projector to show the class the picture of the heart, and as a class they could try to finish the game before the time runs out. It would also be useful for kids learning the multiplication tables or the periodic table of elements; perhaps every few days they could play the game at home and see their progress, as the site lets you compare your current score to your most recent and your all-time best score. The site also lets teachers (or anyone) create their own games, so teachers could create games tailor-made for their individual classes. Check it out and let me know if you can think of any other ways it might be useful!