NOT LIKE FLIPPING A SWITCH: The "flipped classroom" is sticking around in our lexicon for a while, especially with the release of a new book from its founding practitioners). But the Hechinger Report's look at how teachers have implemented the strategy suggests that poorer districts may lose out. In such areas, outside factors--parents, gangs, tech access--affect student motivation and work habits much more than how content is delivered. "It's a sort of a low hanging fruit if innovation," quips Innosight Institute's Michael Horn.