Here you can easily search lessons by student level, by content, length of the video and by content. In the top menu you can easily search by a series of lessons (like the periodic table or writing) or you can become/start a club.
The lessons start with watching the Ted Talk or Youtube video. Then there are some questions under the “Think” section to respond to. After which you can do further research under “Dig Deeper.” This will link to articles or other related videos for the student. Next you can join the discussion and find a bit more information under “And Finally.” There is so much information available on this site. You can also continue to find more information in their blog.