So…what if students took a piece of their writing and entered it into Wordle or another Tag Cloud generator? They could see which words they are using the most. They would be able to revise their Word Choice (6Traits of Writing) based on this visual information.
Here’s an example created from a technology presentation:

You can see I might go back and see how I used the word “information”. Since it is the largest in the Wordle, I used it frequently throughout the piece I wrote. In Wordle’s FAQ they suggest they may make a version for education soon. As it stands, they do not censor their gallery – so be aware…
Another use? Place student descriptions of what the “Lab Rules” are into Wordle to see results. Could be a visual reminder.
More great Wordle Ideas:
Google Docs presentation created by Tom Barrett called Thirty-Eight Interesting Ways to Use Wordle in the Classroom.