Why can teacher certification rules differ from one U.S. state or Canadian province to another?

In federal countries such as the United States and Canada, teacher certification rules differ by state or province because the authority to govern education is decentralized. Unlike nations with centralized national systems, these countries grant individual states and provinces the power to set their own specific requirements for teacher licensing and certification.123

This regional autonomy means that each jurisdiction independently shapes the content and organization of its teacher education programs. Consequently, a teacher certified in one state or province may not automatically be qualified to teach in another without meeting additional local requirements. While some states or provinces may establish reciprocity agreements to facilitate mobility, the lack of a unified national standard often limits the geographic movement of primary- and secondary-school teachers compared to other professions.23

Ultimately, these variations reflect the constitutional or administrative frameworks of these nations, where educational oversight is a local or regional responsibility rather than a federal one.12