Cut and paste any text into WordSift and you can engage in a verbal quick-capture.
"We have added the ability to mark and sort different lists of words important to educators such as the AWL and the GSL. 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."
I think that this site might be integrated into the classroom as a pre-reading activity. A teacher could use the images provided by google and the visual thesaurus to pre-teach specific vocabulary words. This would help build background knowledge and activate learners' schema.