<div>Scratch cover story of the November 2009 issue of CACM, the monthly magazine of the Association for Computing Machinery<br>
<div><a href="http://web.media.mit.edu/~mres/scratch/scratch-cacm.pdf">http://web.media.mit.edu/~mres/scratch/scratch-cacm.pdf</a></div><div><br></div><div>Clear explanation of design principles along with successful, interesting project ideas including some great collaboration examples</div>
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