What do you mean by captive customer? My understanding was that they were all about “parent choice”, so parents can choose to send their kids to either charter

What do you mean by captive customer? My understanding was that they were all about “parent choice”, so parents can choose to send their kids to either charter schools or public schools, and the schools only get federal money proportionate to the number enrolled. Presumably parents would not tend to keep their kids in a school with high teacher turnover. N.b. I don’t have kids, so this is mostly academic for me, no pun intended