Across the U.S., the deaths of educators have torn at the fabric of the school experience, taking the lives of teachers, principals, superintendents, coaches, a middle school secretary, a security guard. The losses have forced school boards to make hard decisions of whether to keep classrooms open and have left students and staff members grief-stricken. … While children generally have mild cases or no symptoms at all, about 1 in 4 of their teachers, or nearly 1.5 million of them, have a condition that raises their risk of getting seriously ill from the coronavirus, according to the Kaiser Family Foundation.