Welcome to TMI – The Episcopal School of Texas! Founded in 1893, TMI is the Flagship private school of the Episcopal Diocese of West Texas. It is located in San Antonio between the greater downtown area and the city of Boerne. TMI educates students in grades 6-12 and is the oldest Episcopal Church-sponsored, college-preparatory school in the Southwest. TMI offers an optional JROTC program, designated as an Honor Unit With Distinction, and 5-day or 7-day boarding for students in grades 8-12.