- Listing Type: Private Schools
- Residency: Day, Residential
- Type: Religious, Private
- Grades Offered: 6th, 7th, 8th, 9th, 10th, 11th, 12th
- Country: United States
- High School Admission Test: Not Required
- Affiliation: The Association of Boarding Schools (TABS)
- CEEB: 446255
- IPED: 1327182
- Tution Boarding: $56,510
- Tution Day: $28,480
- Enrollment: $475
- Financial Aid: Grants/Scholarships
TMI is the oldest Episcopal Church-sponsored, college-prep school in the Southwest and 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.
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. The mission of TMI is to provide an excellent educational community, with values based on the teachings of Jesus Christ, challenging motivated students to develop their full potential in service and leadership.