After I showed my 2nd grade students how to subtract on an open number line, I gave them their assignment. Half my class immediately raised their hands needing help… I tried to help as many students as I could, but they needed guidance with nearly every step of the process. I couldn’t reach everyone fast enough, and we quickly ran out of time. Students were frustrated. And so was I. After reflecting on this lesson, I realized that the main problem was how my math lessons were set up. It wasn’t a