Another thing that happens these days is that a game of telephone has gone from "there are lots of valid ways to understand things, so don't punish kids who get

Another thing that happens these days is that a game of telephone has gone from "there are lots of valid ways to understand things, so don't punish kids who get the right answer with a different method than the one and only way you've been told to teach" to "teach every kid a half dozen different analogies and algorithms for every concept and punish them if they don't know which one you want them to use."