Documents 6/9/2015Bell, Erhard, Perrow, & Smith 1 Lesson Study on Proportional Reasoning by OSO George Mason.....

Slide 1 6/9/2015Bell, Erhard, Perrow, & Smith 1 Lesson Study on Proportional Reasoning by OSO George Mason University Slide 2 6/9/2015Bell, Erhard, Perrow, & Smith…