The number of children being educated at home has been growing for the past few decades. No one knows by how much, and that is part of the problem. Homeschooling is barely tracked or regulated in the U.S. But children deserve a safe and robust education, whether they attend a traditional school or are educated at home.The National Center for Education Statistics (NCES) reported that by last count, in 2019, nearly 3 percent of U.S. children—1.5 million—were being homeschooled. This number, calculated from a nationwide survey, is surely an undercount because the homeschooling population is notoriously hard to survey, and...