Question: What case did Thurgood Marshall argue which established the unconstitutionality of separate schools for black and white students?

full_context: Document 1: Brooks School (Hillburn, New York): Brook School was a grammar school located in Hillburn, New York, in the Ramapo Central School District. . The school was an all-black school, which parents fought to desegregate in the early 1930s and again in 1943.. Thurgood Marshall was hired by the NAACP to desegregate the school. Thurgood Marshall won a disparity case regarding integration of the schools of Hillburn, 11 years before his landmark case of Brown v. Board of Education, on behalf of the village's African-American parents. Leonard M. Alexander and Peter C. Alexander, "It Takes a Village: The Integration of the Hillburn School System. Page Publishing, 2014 (ISBN  ).
Document 2: Plessy v. Ferguson: Plessy v. Ferguson, 163 US 537 (1896) was a landmark constitutional law case of the US Supreme Court decided in 1896. It upheld state racial segregation laws for public facilities under the doctrine of "separate but equal". The decision was handed down by a vote of 7 to 1 with the majority opinion written by Justice Henry Billings Brown and the dissent written by Justice John Marshall Harlan.
Document 3: Cumming v. Richmond County Board of Education: Cumming v. Richmond County Board of Education, 175 U.S. 528 (1899) ("Richmond") was a class action suit decided by the Supreme Court of the United States. It is a landmark case, in that it sanctioned "de jure" segregation of races in American schools. The decision was overruled by "Brown v. Board of Education" (1954).
Document 4: Brown v. Board of Education: Brown v. Board of Education of Topeka, 347 U.S. 483 (1954) , was a landmark United States Supreme Court case in which the Court declared state laws establishing separate public schools for black and white students to be unconstitutional. The decision overturned the "Plessy v. Ferguson" decision of 1896, which allowed state-sponsored segregation, insofar as it applied to public education. Handed down on May 17, 1954, the Warren Court's unanimous (9–0) decision stated that "separate educational facilities are inherently unequal." As a result, "de jure" racial segregation was ruled a violation of the Equal Protection Clause of the Fourteenth Amendment of the United States Constitution. This ruling paved the way for integration and was a major victory of the Civil Rights Movement, and a model for many future impact litigation cases. However, the decision's fourteen pages did not spell out any sort of method for ending racial segregation in schools, and the Court's second decision in "Brown II", 349 U.S. 294 (1955) only ordered states to desegregate "with all deliberate speed".
Document 5: Thurgood Marshall College Fund: The Thurgood Marshall College Fund (TMCF) is an American non-profit organization that supports and represents nearly 300,000 students attending its 47 member-schools that include public historically black colleges and universities (HBCUs), medical schools, and law schools. The Thurgood Marshall College Fund is named for the U.S. Supreme Court's first African-American Justice, Thurgood Marshall.
Document 6: Thurgood Marshall Academy: Thurgood Marshall Academy is a charter school in Washington, D.C., United States., the first law-themed school in DC. Thurgood Marshall Academy was founded based on the principles of Justice Thurgood Marshall that every child should have a world-class education and the opportunity to reach their full potential. The school is located in the Congress Heights region of Washington D.C.
Document 7: Keyes v. School District No. 1, Denver: Keyes v. School District No. 1, Denver, 413 U.S. 189 (1973), was a United States Supreme Court case that claimed de facto segregation had affected a substantial part of the school system and therefore was a violation of the Equal Protection Clause. The entire district in Denver, Colorado must be desegregated. In this case black and Hispanic parents filed suit against all Denver schools due to racial segregation. The decision on this case, written by Justice William J. Brennan, was key in defining de facto segregation. Brennan found that although there were no official laws supporting segregation in Denver, "the Board, through its actions over a period of years, intentionally created and maintained the segregated character of the core city schools." The issue of "intent" would become a key factor in the Boston case.
Document 8: Swann v. Charlotte-Mecklenburg Board of Education: Swann v. Charlotte-Mecklenburg Board of Education, 402 U.S. 1 (1971) was a landmark United States Supreme Court case dealing with the busing of students to promote integration in public schools. The Court held that busing was an appropriate remedy for the problem of racial imbalance in schools, even when the imbalance resulted from the selection of students based on geographic proximity to the school rather than from deliberate assignment based on race. This was done to ensure the schools would be "properly" integrated and that all students would receive equal educational opportunities regardless of their race.
Document 9: Clarence Thomas: Clarence Thomas (born June 23, 1948) is an American judge, lawyer, and government official who currently serves as an Associate Justice of the Supreme Court of the United States. Thomas succeeded Thurgood Marshall and is the second African American to serve on the court.
Document 10: William O. Douglas: William Orville Douglas (October 16, 1898January 19, 1980) was an American jurist and politician who served as an Associate Justice of the Supreme Court of the United States. Nominated by President Franklin D. Roosevelt, Douglas was confirmed at the age of 40, one of the youngest justices appointed to the court. His term, lasting 36 years and 211 days (1939–75), is the longest in the history of the Supreme Court. In 1975 "Time" magazine called Douglas "the most doctrinaire and committed civil libertarian ever to sit on the court".
Document 11: Bolling v. Sharpe: Bolling v. Sharpe, 347 U.S. 497 (1954), is a landmark United States Supreme Court case which deals with civil rights, specifically, segregation in the District of Columbia's public schools. Originally argued on December 10–11, 1952, a year before "Brown v. Board of Education", 347 U.S. 483 (1954), "Bolling" was reargued on December 8 and 9, 1953, and was unanimously decided on May 17, 1954, the same day as "Brown." The "Bolling" decision was supplemented in 1955 with the second "Brown" opinion, which ordered desegregation "with all deliberate speed." "Bolling" did not address school desegregation in the context of the Fourteenth Amendment's Equal Protection Clause, which applies only to the states, but held that school segregation was unconstitutional under the Due Process Clause of the Fifth Amendment to the United States Constitution. In "Bolling," the Court observed that the Fifth Amendment to the United States Constitution lacked an Equal Protection Clause, as in the Fourteenth Amendment to the United States Constitution. The Court held, however, that the concepts of Equal Protection and Due Process are not mutually exclusive.
Document 12: Thurgood Marshall: Thurgood Marshall (July 2, 1908January 24, 1993) was an Associate Justice of the Supreme Court of the United States, serving from October 1967 until October 1991. Marshall was the Court's 96th justice and its first African-American justice. Prior to his judicial service, he successfully argued several cases before the Supreme Court, including "Brown v. Board of Education".
Document 13: Marshall (film): Marshall is a 2017 American biographical drama film directed by Reginald Hudlin and written by Michael and Jacob Koskoff starring Chadwick Boseman as the first African-American Supreme Court Justice Thurgood Marshall and one of the first cases of his early career. It also stars Josh Gad, Kate Hudson, Dan Stevens, Sterling K. Brown and James Cromwell.
Document 14: Thurgood Marshall College: Thurgood Marshall College (TMC) is one of the six undergraduate colleges at the University of California San Diego. The college, named after Thurgood Marshall, the first African-American Supreme Court Justice and lawyer for the landmark 1954 Supreme Court case Brown v. Board of Education, emphasizes "scholarship, social responsibility and the belief that a liberal arts education must include an understanding of [one's] role in society." Marshall College's general education requirements emphasize this culture of community involvement and multiculturalism; accordingly Marshall houses the minors in Public Service and Film Studies for the campus. Significant academic programs and departments have come out of the college over many decades: Communication, Ethnic Studies, Third World Studies, African American Studies, Urban Studies & Planning, and Education Studies.
Document 15: Alexander v. Holmes County Board of Education: Alexander v. Holmes County Board of Education, 396 U.S. 19 (1969) , was a United States Supreme Court case in which the Court ordered immediate desegregation of public schools in the American South. It followed 15 years of delays to integrate by most Southern school boards after the Court's ruling in "Brown v. Board of Education" (1954) that segregated public schools were unconstitutional.
ground_truth: Brown v. Board of Education