The house system is very important to the structure of the school, and there is substantial rivalry between houses in swimming, athletics, choral competitions, and more. The house system also provides pastoral care and a degree of mentoring to students. The rivalry is particularly seen between the two boys' boarding houses, Dart and Wigan, which often used to engage in pranks against each other. This practice was abandoned in 2007 after new administration deemed the activities of the boarding houses to be inappropriate. Dart and Wigan still compete against each other in soccer and Australian rules football matches. These houses used to be one, and their subsequent division may be the cause of the competition. The Dart-Wigan rivalry is often overlooked when competing against the "day" (non-boarding) houses.