Almost 4 years ago, I started at a new school as a 7th grade math teacher. On the first day of school, I taught two separate sections of math class—advanced math and math (or as my students called it “math for slow people”). My home base was a hallmark of diversity—a reflection of the city in every way. Every demographic was represented. When I walked into the advanced math class, I could have been teaching in a different school entirely. Looking back at me was a sea of white faces. My mind began to wonder: In a school that is so diverse, how did we end up at this point? If as an outsider I was able to identify the problem on day 1, how had no one else recognized this as a problem?