Lucianne.com links to a CNSNews.com story about the National Assessment of Educational Progress (NAEP) test scores, just out for 2017. Nationwide, 65% of public school students were not proficient in reading, 67% were not proficient in mathematics.
These numbers make our nation's kids look worse than they are. They represent public school students, private and home school students are not in the sample. Generally both of these perform better than public school kids.
For example, I see Houston and Dallas on the list of cities with poor outcomes in the 20-25% range for proficiency. What you don't realize unless you've lived there - Texans don't brag about it - is urban TX parents who can afford it send their kids to private schools.
These amount to segregation academies in practice as relatively few minority parents can afford them. This tends to be true across the South (elsewhere to a lesser degree) and it depresses NAEP scores.
I am pleased to see my home state of Wyoming ranking 13th in math and 15th in reading. Contributing to raising WY's scores is that there are very few private school students in the state. I'm not certain how prevalent in WY homeschooling is.
A quick look suggests states with large numbers of kids from homes where English is not spoken do more poorly, as would be expected.
