hat happens when a school district catches parents illegally exercising school choice? The school superintendent in Linwood, N.J. hired a $200-an-hour private investigator to determine the real address of students after some parents allegedly lied about where they live in order to send their kids to a better school. In Englewood, N.J., the school board hired an outside management firm to root out illegally enrolled students and force them to pay tuition or attend schools in their home districts. It's a similar story in other school districts across the country. School boards cite burgeoning class sizes and free loading as...