Online course provider ALISON is offering a new, free online class on the basics of 3D printing. Estimated to take about two or three hours, the class provides an overview of how 3D printers work, how to design 3D models, and the various applications of the technology. Users can learn at their own pace, and final assessments are given. If all assessments are passed, users will receive an official diploma. Read more at 3DPrint.com: http://3dprint.com/117694/3d-printin...online-course/