WORD Sift, is a site that allows you to paste in a passage of text create a visualisation of the word frequency, removing some 2000 most common English words. Word Sift allows the user to click the word to feed a visual thesaurus. The tool has been linked to a list of academic word list, developed by Averil Coxhead as her MA thesis at the School of Linguistics and Applied Language Studies at Victoria University of Wellington.
Word clouds have already become a popular way of visualising text for students. Given the diverse language backgrounds of many Australian learners (K12 or otherwise), developing a list within a study area and then be able to relate that to the work of students with discipline resources has tremendous possibilities. A great example of educational technology.