The Education Bureau runs the Secondary School Places Allocation (SSPA) system. At the end of Primary 6, the bureau takes each student's internal examination results from Primary 5 second term, Primary 6 first term, and Primary 6 second term.
The bureau scales these scores against a standardized sampling test and ranks every child within their school net. The system then divides that list into three equal tiers:
- Band 1: The top third (top 33.3%) of students in the net.
- Band 2: The middle third (middle 33.3%) of students.
- Band 3: The lower third (bottom 33.3%) of students.
When central allocation runs, the computer places Band 1 students first. Because students in the top third compete for the same sought-after schools, those campuses fill their classrooms almost entirely with Band 1 pupils. Parents therefore call the campus a “Band 1 school.”