Let's build some vocabulary

Knoword is a very addicting, fun game that is easy to play.  The concept is simple: you start with 60 seconds and are given the first letter of a word and its definition.  Once you type in the correct word, you will be given the next one and 5 seconds will be added from your time while you are awarded 20 points.  If you don't know the word, then you can skip to the next one, but you are penalized 10 points.  If you have a minute, try to play a quick game, and I bet you play more than one to see how high of a score you can get (so far, my highest score is 655 normal difficulty...top that).  At the top right-hand corner, you can select if you want to play on normal or hard.  Also, the default setting is Canadian English, which you will notice has a slightly differently spelling on a few words.  You can change it to American English by just clicking on the top right hand dropdown menu and switching it.  You could easily get a leaderboard going for your classroom.  When students have downtime - challenge them to see if they can get a high score.