Black people are allowed in private schools. Prep, JA, MRA have black people enrolled. Just about all the private schools in MS are "religiously affiliated." The majority are Christian belief. I say Christian belief because a lot of them don't affiliate to one certain religion. There are several Episcopal Academies and Catholic Schools. The Catholic Schools have played in the MHSSA for years. Many of the private schools use curriculum from Abeka
https://www.abeka.com/ChristianSchool/ . Myself, like many of my classmates, went to private school because the public schools in our area did not provide as good of an education.