What was the unique about the public school system that was established in the south?

At the turn of the 20th century, schools in the South, and many in the North, were segregated. The 1896 Supreme Court ruling, Plessy v. Ferguson upheld the legality of segregation. Finally, in 1954, the Supreme Court overturned its ruling with the landmark case, Brown v. Board of Education, and public schools became open to people of all races.