I have two reflections for this video. First of all, we are in a constant movement that not even we almighty humans can control, so how can we get a little grasp of that control? Finally, it is more than evident that English does not belong any more to the English speaking countries, English belongs to its users!
This other video shows us the big challenges into how to teach something that cannot be evaluated: Creativity, Curiosity, Sense of Adventure, Ambition. We need to develop student's abilities to Think, Question, Evaluate! I realize that these are basic words for the 21st century teacher!