Guide to the Best Educational sites in the world. Amazon Education Amazon Inspire is a free service for the discovery of digital educational material. amazon.com/education Big Think Video interviews with 600+ thought leaders in a range of fields. bigthink.com Brightstorm Short-form online video lessons by professional educators. Free math lessons. brightstorm.com CosmoLearning Aggregator of free, online video lessons and documentaries. cosmolearning.com Coursera Lectures taught by world-class professors and reinforced through interactive exercises. coursera.org EdX Courses designed specifically for interactive study via the web. edx.org FutureLearn Offers a diverse selection of courses from leading European universities. futurelearn.com GCFLearn Free online courses teaching basic life skills, technology, literacy, and math. gcflearnfree.org Howcast Professional and user-generated ho...