Trinity College is a low-fee independent school in Gawler, South Australia. The college has an enrolment of 3500 students of varied socioeconomic mix, drawn from the northern suburbs of Adelaide. Trinity has recently been restructured into four R-10 schools and one senior school for Years 11-13. The schools share a common mathematics curriculum. This article describes the establishment of a mathematics enrichment community, its outcomes, and its relation to the six components of successful mathematics instruction. Using materials from the Australian Mathematics Trust, the program was implemented during terms 2 and 3, 2005, and involved students from Years 5-10 from four of the schools at Trinity College.