Mark Walsh writes: “How much ‘academic freedom’ do K–12 teachers actually have to teach what they want? How far does the First Amendment go in shielding them? And where would they stand in the face of new state laws taking aim at the use of critical race theory or the teaching of antiracist lessons? Measures introduced in at least 20 state legislatures to rein in teaching about race and other controversial and ‘divisive’ topics have thrust teachers into uncertainty over what they can discuss in the classroom and whether they would face discipline or other legal consequences if they overstep.”