Why are America’s schools so short-staffed? Experts point to a confluence of factors including pandemic-induced teacher exhaustion, low pay and some educators’ sense that politicians and parents — and sometimes their own school board members — have little respect for their profession amid an escalating educational culture war that has seen many districts and states pass policies and laws restricting what teachers can say about U.S. history, race, racism, gender and sexual orientation, as well as LGBTQ issues.