Thanks to Heidi Ramirez-Weber for suggesting an Academic Language corner, and also for turning us on to this really amazing tool for educators. It's called Word Sift - it's free and the link is on the right. Check it out!
Here's more about what it is:
WordSift helps anyone easily sift through texts -- just cut and paste any text into WordSift and you can engage in a verbal quick-capture! The program helps to quickly identify important words that appear in the text. This function is widely available in various Tag Cloud programs on the web, but we have added the ability to mark and sort different lists of words important to educators. We have also integrated it with a few other functions, such as visualization of word thesaurus relationships (incorporating the amazing Visual Thesaurus® that we highly recommend in its own right) and Google® searches of images and videos. With just a click on any word in the Tag Cloud, the program displays instances of sentences in which that word is used in the text.