The Official Twitter Page of DeMatha Catholic High School: Faith-Filled Gentlemen and Scholars DeMatha Catholic High School is a private college preparatory institution outside of Washington D.C. DeMatha Catholic High School is a college preparatory institution dedicated to educating young men in the Trinitarian tradition.  DeMatha’s mission is to serve students of differing abilities, interests, and backgrounds from the diverse greater Washington Metropolitan area. Faculty and staff help young men develop a way of life characterized by attention to scholarship, dedication to moral principles, devotion to hard work, and the awareness of the need to serve others.  Through a broad-based and rigorous curriculum, numerous opportunities for spiritual growth, a wide range of co-curricular opportunities, and a comprehensive service program, DeMatha cultivates a respect for other people that finds its most complete expression in students who become gentlemen and scholars.