90th percentile teachers teach kids 3x as much as 10th percentile teachers.http://www.economist.com/news/briefing/21700385-great-teaching-has-long-been-seen-innate-skill-reformers-are-showing-best …
See also the Bloom 2 sigma effect https://en.wikipedia.org/wiki/Bloom%27s_2_Sigma_Problem …, studying the difference b/w classroom & 1-1 tutoring
-
-
did you read Kevin Drum's comment about it? http://www.motherjones.com/kevin-drum/2016/06/wed-be-better-if-every-human-were-good-top-10-percent-humans … One of my favorite liberal pundits.
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.