A self-selected choir is any choir where students of all ability levels can participate
A self-selected high school choral program does not remove the stronger singers and doesn’t cut the weaker singers; all students sing together in the same ensemble. Any opportunities for the strongest singers, such as a chamber ensemble, would be in addition to the self-selected ensemble.
Self-selected ensembles can be limited to ages or voice-types, but not limited by ability.
While students self-select into their ensemble, the director can have high expectations of each student; these expectations must be attainable by all members in the ensemble and can be varied based on the skill and experience level of each individual.
With clear expectations set by the director, it is the responsibility of each member to individually achieve at a high level.