What Pisses off the Man Who is the Face of 3D Printing
Chris Koch
MAY 19, 2014
They retained the information better when they watched the videos than they did when I taught in person,” he recalls. Indeed, when he began uploading the videos to the internet (this was pre-YouTube days), they got tens of thousands of views. Viral How-Tos. Not that Pettis was a bad teacher.
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