After public schools were integrated in the 50s, segregation academies popped up all over the South. Because private schools didn't have to integrate (loophole). This process continued for many of the following decades. I'm wondering if this is still allowed by law
Title II of the Civil Rights Act of 1964 prohibits discrimination because of race, color, religion, or national origin in certain places of public accommodation, such as hotels, restaurants, and places of entertainment. "Places of public accommodation" includes private schools.
The Act applies to discrimination against customers. The wording states, "places of public accommodation." The link I gave you states, "A public accommodation is a private entity that owns, operates, leases, or leases to, a place of public accommodation. Places of public accommodation include a wide range of entities, such as restaurants, hotels, theaters, doctors' offices, pharmacies, retail stores, museums, libraries, parks, private schools, and day care centers." So, the term applies to both customers and employees, though it's different legislation.