Hallahan offers a wide variety of extra-curricular and co-curricular student activities. The Assistant Principal for Student Affairs directs this extensive activities and athletics program for the purpose of providing different experiences and leadership opportunities for the Hallahan students. These activities help build a sense of community, provide outlets for expression, and develop a sense of responsibility, cooperation and service among the students. Faculty moderators supervise every activity. Activities may be added or replaced each year according to student interest. Students with suggestions are always welcome and encouraged to share ideas in the Student Affairs Office, located on the first floor of the Hallahan building.