What happened in American schools after the 1954 U.S. Supreme Court decision in Brown v. Board of Education?

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1 point
States could continue segregation as long as facilities were separate but equal.
Individuals of different races voluntarily stopped all forms of school segregation.
The federal government ordered that states desegregate classes.
Desegregation was ordered for only high schools.

The federal government ordered that states desegregate classes.