Let’s teach for mastery, not test scores by Melissa Thompson | Sep 16, 2016 | TED Talk: Sal Khan http://www.ted.com/talks/sal_khan_let_s_teach_for_mastery_not_test_scores?utm_source=newsletter_daily&utm_campaign=daily&utm_medium=email&utm_content=button__2016-09-06#t-77050
