QSIY offers a wide range of after school activities that are open to all students. Most of these activities are taught by the teachers of QSIY but in situations where there is not a staff member able to fulfill a need, QSIY brings in outside contractors.

Each ECA runs for one Quintile and meets once a week. Students are encouraged to participate in as many as they can. Transportation is provided through the 'Late Bus' for students staying after hours for an ECA