One of my first moments of seeing the power of visuals in math learning came over a year ago, in June 2016. I was teaching fifth grade, and I gave my students an open-ended math task on a green sheet of grid paper with two different right triangles printed on it. I chose this task from several I’d gathered at a math conference that March.
This task held the promise of a different, and I hoped better, way to teach math. Until then I had been teaching each lesson pretty much as it was written in the curriculum guide, following along as best I could and finding myself unsatisfied and discouraged year after year.