All Souls participates in the Archdiocesan Junior High Academic Decathlon. This is a competition for students in grades 6-8. Students compete against over 100 schools from within the Archdiocese of Los Angeles. There are collaborative team efforts: a logic quiz with 20 rigorous thinking problems and a super-quiz with 50 multiple choice questions on five broad academic themes. The remaining eight events test individual knowledge of religion, English, literature, science, math, current events, art and music.