When I was a sophomore in high school my English teacher, Ms. Rock, gave us a link to a website that both improves one's vocabulary and gives one a chance to fight world hunger. Freerice.com is a vocabulary game. With each question you answer correctly 10 grains of rice will be donated by Freerice's sponsors to help people living in poverty. The game starts out easy and gets harder as you progress.
If you are looking to sound a little smarter when you speak, fight hunger or kill some time stop by freerice.com and play! Its a win-win situation!