Benjamin Knorr, a 40-year-old single father in Janesville, Wisc., says there’s about a 50-50 chance he’ll send his two teenage sons back to school this fall. His 13-year-old, Aiden, would especially like to get back to his friends, sports, and regular life. But Knorr, an independent contractor, has asthma, and fears that his health and finances would be imperiled if one of his boys brought COVID-19 home from school. “If the numbers go up in Dane County and Rock County, where I work and live, it’s over. We’re just doing the online school,” Knorr says. “We already got through two months of it, and yeah, it was hard. It was stressful. And yeah, it was more work on my part to come home and do the online schooling with them and stuff. But we can’t be homeless.” As school districts across the United States decide whether to welcome kids back into the classroom for in-person education this fall, administrators find themselves weighing a complex set of variables. There’s the ris