Recently departed DISD Superintendent Mike Miles' legacy is complicated and controversial, but he leaves behind a handful of successes, chief among them Mata Montessori in East Dallas. The first in what was intended to be dozens of "schools of choice" — neighborhood-focused campuses with the specialty programs of a magnet but without the competitive admissions — Mata did a remarkable job of fitting the Montessori model of carefully guided self-direction into an often rigid DISD structure. Teachers and administrators there are passionate, energetic and wholly committed to students' success. A-plus.