The International School Mainfranken has a House System in which each student from Grade 1 – 12 is a member. The aim of the House System is to bring students together to raise the spirit of the school, to feel included and to be a part of positive competition. There are four Houses: Fire, Water, Earth and Air. The students are divided equally between the Houses, special attention being paid to the balance of girls to boys, different nationalities and ensuring that siblings are in the same House. Houses also have several members of staff who help organize, supervise and take part in the events.
There are several events where students compete against each other to win points for their respective Houses. At the end of the year the points are calculated and the winning House receives a trophy to be displayed in school.