The ABC Founder's Cup is an annual sports event which takes place at the ABC. It is named to commemorate the original members of the board which founded the school in 1971. The 4 school's 'tribes' are the Aztecs, Mayas, Pipiles and Incas. They are all represented by different colored uniforms. They compete for points in several sporting events, after which the tribe with the most points overall wins the trophy for a full year. The year after, the trophy is once again contested amongst the 4 tribes. In 2010, the Incas won the Founder's Cup.