Over 5,000 teachers have signed a pledge at the Zinn Education Project that states they vow to continue to teach controversial critical race theory (CRT) concepts to their students, even if outlawed in their state, amid growing backlash from parents against the teaching of CRT in their children’s schools. The Zinn Education Project produces history lessons based on books by Marxist writer Howard Zinn, including “A People’s History of the United States.” The materials are offered free to K-12 teachers across the country. CRT is rooted in the Marxist theory of class struggle, but with a particular focus on race. Proponents of CRT see racism in every aspect of the American public and private life and seek to dismantle American institutions—such as the Constitution and legal system—which they claim to be inherently and irredeemably racist. While schools have for years been quietly infusing CRT into their curriculums, it wasn’t until last year, …