Question

what u.s supreme court ruling established the idea of "separate but equal" and made if possible for school districts to place black children in overcrowded, poorly funded, black-only schools

Answer 1

The u.s.supreme court ruling confirming the legal doctrine of "separate but equal" making it possible for school districts to place black children in overcrowded, poorly funded, black-only schools was "Plessy v. Ferguson" of 1896. The doctrine started to be overturned only by 1954, through "Brown v. Board of Education".

Answer 2

Plessy v. Ferguson established "Separate But Equal". I wrote an entire research paper on this topic.