Legal school segregation refers to the systematic separation of students in public schools based on race, which was sanctioned by law. This practice institutionalized racial discrimination and was justified by the 'separate but equal' doctrine established in the 1896 Supreme Court case Plessy v. Ferguson. The ramifications of this segregation were deeply felt during the 1960s, as civil rights activists worked tirelessly to dismantle these discriminatory laws and promote equal access to education for African American students.