Answer
Segregation in schools was ruled against in Brown v. Board of Education, a landmark 1954 Supreme Court case. The unanimous decision overturned the Court's previous ruling in Plessy v. Ferguson (1896), which established the "separate but equal" doctrine, allowing racial segregation in public facilities. Brown v. Board held that racial segregation of children in public schools was unconstitutional, violating the Equal Protection Clause of the Fourteenth Amendment.