http://www.stevewyborney.com/?p=556 — this is a quick video showing finding the mean as “leveling off.” It’s done with number rods and it’s short and sweet (and not too many words). I’m not sure students would see the connection between that and means in the context of real situations but that could be addressed.
A tweeet in the MTBoS (Math Twitter Blog-o-Sphere, I think) says when asked that no, secondary math teachers don’t think they need to learn about pedagogy (tho’ obviously that’s not universal – they’re out there in the MTBoS :)) Still… that would help explain popularity of online videos… and is something to ponder…
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howardat58
September 12, 2015
I occasionally used to get a few students to stand in line and ask about average height. Any mystery was solved when I suggested that we chop a bit off this one and add it to that one, repeating until they were all the same height – voila ! the average.
xiousgeonz
September 12, 2015
… I was thinking watching the video that it was missing a human connection — that’s a literal way of making one .