More than 200 organizations across the country are staging some 3,600 events to mark this year’s School Choice Week. But many grateful parents have reason to celebrate every week. Just ask Joseph Kelley. A single father living in Washington, D.C., Kelley was shocked when his son Rashawn failed the first grade. Worse, his teachers didn’t even realize that he knew how to read. But rather than work to improve his vocabulary and get him up to grade level, the D.C. Public School System placed Rashawn in special-education classes. Kelley knew his son was smart but wasn’t being well-served by his...