TED-Ed is described as '’s commitment to creating lessons worth sharing is an extension of TED’s mission of spreading great ideas. Within the growing TED-Ed video library, you will find carefully curated educational videos, many of which represent collaborations between talented educators and' and is a popular online education service in the education & reference category. There are more than 50 alternatives to TED-Ed, not only websites but also apps for a variety of platforms, including Android, iPhone, iPad and Android Tablet apps. The best TED-Ed alternative is Khan Academy, which is free. Other great sites and apps similar to TED-Ed are Coursera, edX, Udacity and Open Yale Courses.