[Cardfan1]

To my understanding, which is limited at best. An independent school is one that operated independent of the "counties" state funding. It receives its own state funding, but it is less than what a county school gets.
A private school is one that operated completely independent of state funding. They are primarily funded through fund raising and tuition. A charter school is one that has giuldines more similar to a private school but they receive state funding. They receive these state funds in return for tougher academic accountability. They must write their charter which is in line with their mission statement and adhere to it.

Charters don’t always have tougher academic accountability. In fact, charter school rigor has been largely problematic with the schools in question not requiring student attendance and teaching the state educational standards.
It is a myth that charter schools are more academically successful, and a shame that our state has fallen for it.