The formation gap is how the place rule holds in practice. A floor on paper fails if good teachers and mentors cluster where life is pleasant. So the bodies that measure the formation floor also publish where it is not being met. When a gap opens, the response follows the care gap: raise commission pay there until people come, add travel, residencies, and remote mentoring so children can reach what their town cannot host, and open training paths. It measures places, never children.
The formation gap
The published measure of where formation falls below its floor in practice, in unfilled teaching and mentoring posts, waiting lists, and reach to programs, which raises commission pay there until enough teachers and mentors come.