What does it mean if a school is plc?

PLC in the context of a school stands for Public Limited Company. This means the school is a company whose shares are traded on a stock exchange, and it's owned by its shareholders. This is relatively uncommon for schools, as most are either publicly funded (state schools) or privately funded (independent schools) but not structured as a plc. If you encounter a school described as a PLC, it's likely operating under a unique and potentially for-profit model.