 According to the school's enrollment procedures found on their website, enrollment preferences (which are authorized by the Santa Clara County Office of Education) are applied based on a prescribed hierarchy within each grade level.One such preference, specifically for those students residing in the attendance area for the original Bullis-Purissima Elementary School, was a source of some controversy as it was perceived as giving special priority to children from certain affluent parts of Los Altos and Los Altos Hills.This characterization does not reflect the original intent of the preference, however, which was to foster a greater sense of community.