When the editors of The American Heritage College Dictionary assembled their list of 100 words every high school graduate should know, the response was over-whelming. The editors received so many requests to reproduce the list, they put it on the Houghton Mifflin website (ahdictionary.com). The site has since been visited by hundreds of thousands of curious minds. This handy book includes valuable information about the words on the list that both prospective and retrospective graduates can put to good use. The editors chose these words because they were challenging. They are the kind of words that a successful high school graduate can learn from rigorous coursework in a standard variety of subjects. At the same time, the words see regular use in newspapers, magazines, novels, media broadcasts, and many other places as well.