Aaaaccckkkk...
It says “public schools” right in the link. Sorry ‘bout that. Ignore my last question to you.
So, it’s just government schools - not private, parochial, religious, or home schooling, which tends to indicate that the number of white kids in our public schools isn’t a reliable yardstick for determining the percentages of racial groups in Texas.
It appears that we’ll need to see the results of the actual census to find out if your assertion has any validity.
Well, it is actually.
According to the TEA, NCES and Texas Home School Coalition 91 percent of Texas students are educated in public schools, 4% in private schools and 5% are homeschooled (2016). So even if EVERY child attending a private school or homeschooled were white, white kids are still a significant minority of students in Texas. And I doubt whites make up for the entirety on non-public schooled children.
Bottom line is, the future of Texas (as goes the rest of the country) looks to be very, very brown.