How much a video weighs and why the chicken crossed the road: 13 great questions from Vsauce creator Michael Stevens.
How much a video weighs
What color is a mirror? Teaches optics
Why is your bottom in the middle?
What if everyone jumped at once?, earth rotation
DR. RICHARD CURWIN'S http://www.edutopia.org/user/82998
If you ask a student a question, and the student says, "I don't know," try to elicit a guess
Here is an example that seems to work a vast majority of the time, even though it sounds goofy. I recommend trying it before judging it. You might be surprised., Student: I don’t know. Teacher: If you did know, what would you say?
Teaching of Psychology, 29(1), 73-75. - Britts, M. A., Sellinger, J. & Stillerman, L. M. (2002) http://www.amazon.com/Comprehending-Behavioral-Statistics-Russell-Hurlburt/dp/053460627X/ref=sr_1_1?s=books&ie=UTF8&qid=1389873575&sr=1-1