Most, if not all, readers are familiar with the criticism of a typical U.S. mathematics curriculum being “a mile wide and an inch deep” (Schmidt, McKnight, & Raizen, 1997). A recent analysis by the Center for the Study of Mathematics Curriculum (Reys, Dingman, Sutter, & Teuscher, 2005) reaffirms the crowdedness of most state mathematics standards. However, criticism of U.S. mathematics curricul...

Keywords can be used as attributes for mining rules or a basis measuring the similarity of new (unclassified) documents with existing (classified) ones. The focus is on problem extracting keywords from document collection in order to use them classification. Document classification hot topic machine learning. Typical approaches extract “features,” generally words, document, and feature vectors ...