Arizona Phoenix College math instructor James Sousa has been teaching math for 15 years at both the community college and K-12 levels. Over the years, he has developed more than 2,600 video tutorials on topics from arithmetic to calculus, and made these videos available on YouTube, originally under a CC BY-NC-SA license. His website and…

Many of you have heard about California’s Free Digital Textbook Initiative that launched last spring, which called for submissions of free digital textbooks in math and science for use by the state’s schools. Of the 16 textbooks submitted last year, 15 are openly licensed under one of the Creative Commons licenses—and all 10 that passed…