I loved how E was able to connect these three numbers as one; a sum. His drawing made me think about bar models and wonder if we tried to draw the problem with a bit more reality could bar models make more sense. A couple of years ago I tried to jump right into modeling and encouraging students to use bar models as a way of making sense of their math problems. It was challenging and harder than I thought. I knew better but the district resource made it look so easy. I'm wondering now, if we encourage more drawing prior to introducing bar modeling would there be a deeper understanding and easier transition to using bar models as one problem solving strategy.