Learn from a video lesson with exercises and further resources and discussion as well. Ted-Ed provides video based lessons that people have developed into fuller lessons using question and answer exercises after the video, futher information and resource references, and online discussion boards. You can search for the subject area or lesson topic you would like to learn about. Then, you watch the YouTube video lesson (Watch) and practice what you learn with questions and answer (Think), further information (Dig Deeper), and discussion (Discuss). Engaging platform to learn. You can also create your own lesson using a YouTube video and the tools that Ted-Ed provides.