Hi! I discovered how to delete the comment with all the gibberish. You do have to be careful with DIIGO when highlighting with a mouse--especially on a web page, it is easy to accidentally highlight more than you intended.
What is the difference between "a hearty welcome" and "a cordial reception"? In a brief, action-packed history of the English language, Kate Gardoqui explains why these semantically equal phrases evoke such different images.
Bulent's comment about TEDtalks for education prompted me to share this link, about the evolution of English. It shows you how TEDed has been developed for specific educational purposes. Notice that there is a introductory video, a short quiz, and then a 'think deeper' page with more resources to follow.