In this video, a very determined third-grade girl attempts to add large numbers using an Investigations Math strategy. It takes eight minutes to get the wrong answer. In one minute, she finds the right answer by using the traditional “stacking” method she learned at home. (It’s not allowed in school.) Investigations is supposed to teach conceptual understanding. The girl says it’s “confusing.”
Also on Out in Left Field, Barry Garelick wonders how teachers can be evaluated if they’re forced to use ineffective curricula. Check out the lively debate in the comments.