 Private schools are another institution used in attempt to narrow the racial achievement gap.A disparity between achievement gaps in private and public schools can be seen using a U.S. Department of Education database to compute the average National Assessment of Educational Progress test score differences between black students and white students in both public and private schools.The table on White/Black NAEP Achievement Differences for Public and Private Schools above, shows a sizeable achievement gap between black and white fourth-graders in both public and private schools.