The Plyler v. Doe case challenged a Texas law that allowed public schools to deny enrollment to undocumented immigrant children and withhold funding for their education. The US Supreme Court ruled in 1982 that the law violated the Equal Protection Clause of the 14th Amendment. The Court found that denying children an education based on their immigration status or that of their parents would harm them and society. This landmark ruling established that all children, regardless of immigration status, are entitled to equal access to a K-12 public education.