The Booster Club is designed to help support the extracurricular sport programs at ISS by promoting both team and school spirit. The club organizes and manages volunteer activities from fundraising events to sports events hosted by ISS. The fundraising events include concession stands at athletic events, sales of team merchandise and monthly lunches for Upper School students on the Degerloch Campus. The Booster Club helps support the Athletic Department with student banquets and event hosting.
Parents of all ISS athletes are automatically members of the Booster Club and are encouraged to attend monthly meetings as well as volunteer their time to help with Booster Club activities.