Allow parents choice with their education funds. Open Charter schools. Teachers have choices for where they want to teach. Existing system, which obviously isn't all that great will be reborn with competition. Advanced degrees, remediation opportunities, grade accelerations...
Best schools win. Best teachers win. Students and parents win.
We know for sure that putting more money into public schools hasn't fixed them. What is wrong with doing something new and different? Nothing I say. Nothing. When you can't fix something in place, best plan is to build another option in parallel and evolve everything, decommissioning what doesn't pass muster.
Intersection of principles and practices...