Students are posted to secondary schools based on merit. Student with a better aggregate score will be considered for admission first subject to the availability of vacancies in the selected school. If there are no more vacancies, then the student will be considered for his/her next choice school(s).
In situations where there are two or more students with the same aggregate score vying for the last place in a school, they will be posted based on their citizenship status (i.e. Singapore Citizens, then Singapore Permanent Residents, then International Students). If there is still a tie, say between two Singapore citizens, then posting into the school will be determined by a computerised ballot where each student is given an equal opportunity.