Last week, an organization called PragerU announced that the state of Florida had approved it as an official vendor for educational material. This was a controversial development: PragerU’s explicit mission is to combat “leftism” in education, and until now, its materials had not made it, at least officially, into any public schools. But for Florida, the news tracks with recent trends. The 2022 Stop W.O.K.E. Act banned schools from teaching children about privilege and systemic racism. Gov. Ron DeSantis’ administration blocked an Advanced Placement course on African American studies over claims it violated state law. The state’s new educational standards,...