Professor David Lippman has saved students a million dollars. David co-wrote two math textbooks and built iMathAS, a free, open-source math assessment and course platform. Nearly all of his work is licensed under a Creative Commons license, allowing others to access, reuse, and edit his work for free.
Unlike traditional publishers that won’t publish known textbook errors out of fear of compromising their business, David wants edits. “Whatever I create’s not going to be perfect. So I want to make sure that people have the ability to make changes and improvements, and hopefully contribute back.” One volunteer once contributed a thousand copy edits — for free. “He wouldn’t have done that for a traditional textbook.”
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