Are 30 million Powerpoints really given each hour?(profgarrett.com)
profgarrett.com
Are 30 million Powerpoints really given each hour?
http://profgarrett.com/2011/12/14/are-30-million-powerpoints-really-given-each-hour/
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http://profgarrett.com/2011/12/14/are-30-million-powerpoints-really-given-each-hour/
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