the more obvious it became that real academic improvement meant opening K-12 education to outside competition—from charter schools, independent schools, private tutoring, home schools, and most recently online academies—the more teachers unions began to discover a cause even more important than higher reading and math scores: engineering social justice. It began perhaps innocently enough with a greater emphasis on bilingual instruction, softer disciplinary techniques, and multicultural awareness programs. But with time it became clear just how effectively a never-ending succession of progressive palliatives for racism and sexism—minimizing testing and grading, ending the grading of homework, making grade level advancement automatic, eliminating selective-admission public schools, and recognizing multiple valedictorians—could shield both teachers and administrators from any academic accountability.

As Williams College political science professor Darel E. Paul has suggested, antiracism and related woke policies even allowed failing professionals to pose as heroes, defying the “tyranny” of traditional academic standards to champion more equitable schooling outcomes. Progressivism not only gave public educators the appearance of shouldering “noble tasks,” but conveniently justified their ever-growing salaries and benefits to accomplish those tasks.

(In the wake of President Trump’s January 6 D.C. rally speech, one suburban Connecticut superintendent was apparently so taken with his progressive mission as to publicly attack every local parent who had ever re-tweeted a Trump remark, shouted “lock her up,” agreed that Biden was not up to the job, or countered BLM with “all lives matter.” Each one of them, he posted to his Facebook page, was “a co-conspirator who has sided with domestic terrorism.”)

Unfortunately, few human institutions are capable of simultaneously upholding two competing worldviews. The result is that what began as a progressive set of policies related to how children are educated has increasingly changed what children are taught. In other words, the progressive outlook once associated with adjuncts to learning—school assembly programs, extracurricular activities, teacher development seminars, and the kinds of grading policies already mentioned—has more and more become embedded in the subject matter itself.

And not just in the most obvious places, such as history and the social sciences, but in math and English as well. In Seattle, for example, the public schools have adopted an “anti-western” or “re-humanized” mathematics curriculum, which advances failing students on the grounds that they should not have to learn a subject intrinsically unfair to people of color.

When it comes to English, Wall Street Journal columnist Meghan Cox Gurdon has chronicled growing efforts around the country to ban everything from Homer to Shakespeare to F. Scott Fitzgerald. With what is left, she says, “The subtle complexities of literature are being reduced to the crude clanking of ‘intersectional’ power struggles.”

In January of last year, even the New York Times expressed concern at how widely different editions of the same public-school textbook could vary, depending on how liberal the state. “Classroom materials are not only shaded by politics,” wrote national correspondent Dana Goldstein, “but are also helping to shape a generation of future voters.”

Because public education is technically a state responsibility, some might argue for letting school boards deal with the growing problem of a progressively biased curriculum. But the fact that most people serving on local school boards typically do so because they have at least one child in the system means, as a practical matter, that educators have far more leverage over boards of education than boards have over teachers and administrators. Even those parents willing to challenge subject matter are usually no match for administrators “with advanced degrees [who] flash their credentials and have glib answers for every question,” laments Dr. Armand Fusco, a retired public school superintendent who has written extensively on the need for school board reform.

Indeed, the existence of easily manipulated school boards, combined with support from a vocal minority of left-leaning voters, has led to the creation of course content so clearly at odds with the larger community’s values as to be almost unbelievable. In the red state of Ohio, for example, the Department of Education started off the 2020 academic year by providing local social studies teachers with a resource it called its “Anti-Racist Allyship Starter Pack”—links to 200 op-eds, essays, and blog posts on such academically relevant topics as “In Defense of Looting,” “Capitalism is the Real Robbery,” and “The Case for Delegitimizing the Police.”

If by some miracle local boards did assert greater control over what is taught in their schools, they would still be in the morally dubious position of imposing a single perspective on a population more politically and culturally divided now than it has been since the Civil War. Having a greater say over the curriculum might be good news for those households comprising the majority view in each community, but what about the minority—left or right—who will continue being taxed to support a political and cultural agenda they abhor?

Are those families which remain at odds with the prevailing ideology to be dismissed as simply “out of luck?” As Michael McShane, director of national research for EdChoice, has observed, today’s public school district may still be a local organization, but the disagreements are now too deep for it ever to be a pluralistic one.

The traditional argument for giving public schools an exclusive call on government funding has been the desirability of instructing all of America’s children in the larger community’s shared civic values. But the strategic decision of professional educators to ideologically camouflage their academic shortcomings—combined with an unprecedented cultural divide—effectively means that in our time, fewer and fewer values are held in common.

For decades, the National Education Association (NEA) and other teachers unions fought school choice on the grounds that taxpayers’ dollars would inevitably end up funding religious schools; and public money, they said, should never support an ideology not universally shared. Ironically, that is an excellent argument for why today’s public schools should no longer keep their monopoly on government funding: every American parent has the right to protect his or her child from being propagandized by an alien ideology.

Dr. Lewis Andrews was executive director of the Yankee Institute for Public Policy at Trinity College from 1999 to 2009. He is author of the new book Living Spiritually in the Material World (Fidelis Books).