I taught 36 students in a fifth-grade classroom in a low-income neighborhood predominately serving children of color in California. As a seventh-grade teacher in a similar neighborhood, I had classrooms of 39-40 students. Now, teaching in a suburban school with mostly white students, I have 22-23 fourth-grade students. The access to materials, healthy learning conditions, etc. are remarkably different.
All 50 states still use property taxes as a source of funding for their schools. This creates distinctly different educational learning experiences based upon neighborhood wealth. While we live in a post-Brown v. Board education world, we are sadly not even achieving the goals of Plessy v. Ferguson ("separate but EQUAL"). This system maintains the current power structure, which is what the construct of race was created to do.