Brown v Board of Education was the landmark Supreme Court case in America that was supposed to allow more educational choice for all Americans, basically stopping segregational policies and on a legal level schools were to be integrated. While the results did not go as planned the case itself was an amalgamation of other legal cases that made their way through the courts in the early/mid 20th century.
Were there others that happened before this time in either the early 20thC or in the 19thC that might have been lost before this decision? Typcially it takes years and multiple tries to get a case to the Supreme Court so it seems that these cases can't be the only ones and so far I haven't found many more that might have been tried.
More on Brown v Board of Education can be found here if needed.