Wordle lets you either copy and paste or upload text. It then produces a word cloud that give greater prominence to words that appear more frequently. You choose from different formats about how you want your word cloud displayed, and then have them displayed on the website with its own url address.
This could be a fascinating exercise for English Language Learners and other students. Beginning ELL’s could use it to see the importance of learning sight words. Social Studies students could upload speeches by Barack Obama and John McCain and compare the two.
I know there have been other ways to identify high-frequency words from text, but I think Wordle is the easiest and has the most elegant presentation.
I haven’t figured out, though, where I’ll be putting it on my website yet.