Help wanted: Frontline soldier in the culture wars. Willing to take flak from all directions. Responsible for keeping 30 young people safe. Expect battles with bureaucracy, active shooter drills, deteriorating physical plants, and low professional respect. Summers and most holidays off, except for the paperwork. Not rushing to apply? You’re not alone. As we head into the school year, districts in the U.S. are contending with a grave shortage of teachers (see Briefing, p.11). Teachers are quitting, and the ones who are staying are unhappy; 90 percent say they are suffering from burnout. There’s no puzzle about why. In red states, teachers are threatened with criminal sanctions for saying the wrong thing, and the very notion of education as anything more than training for efficient workers is treated with contempt.…