Since that inaugural year, the school has grown from 13 students to more than 500, moved to a 15-acre (61,000 m2) campus in West Lake Hills and built seven buildings.

The vertically integrated curriculum embeds basic algebraic and geometric concepts into the earliest math education and incorporates the workshop approach developed by Catherine Fosnot of the City College of New York.

Students can also earn high school credit for a number of other classes, including Latin, Speech, and Integrated Physics and Chemistry.

[citation needed] The Trinity Tornado competes in the Austin Inter Parochial League (AIPL) in the following sports: Girls: Cross-Country, Volleyball, Basketball, Lacrosse, Soccer, Tennis, Track, Golf, Swimming Boys: Cross-Country, Tackle Football, Flag Football, Basketball, Soccer, Lacrosse, Tennis, Track, Golf, Swimming Trinity has an arts program that incorporates both elective courses and extracurricular activities.

Trinity's Varsity Choir won the Best in Class trophy at the 2009 Lone Star Showcase choral competition in Dallas.