A Cappella Choir (listed as Vocal Ensemble 1-4) is the varsity mixed choir of Hebron High School. A spring audition is held to select these vocal students. The A Cappella Choir performs at all Hebron High School choir concerts, LISD and UIL competitions (solos and ensembles) and its members are the TMEA All-State Choir audition participants who represent Hebron High School during the fall auditions. Students in this choir are expected to learn and perform more music at a faster pace. They are evaluated on the basis of participation, individual and group singing tests, and attendance to various rehearsals and performances during the year. A Cappella performs at several community and civic events during the school year. A Cappella members are strongly encouraged to attend a summer choir camp to prepare for Texas All-State Choir auditions. A Cappella students must remain in the choir for a full year.