Singapore education system carries out a streaming practice. Students are separated from secondary schools to study general or vocational education courses, but the two can be flexibly switched. Universities also provide multiple ways of admission for various groups of students. The streaming education system requires a categorized admission mechanism, in which students from pre-university institutions mainly apply to universities based on “General Certificate of Education,” i.e. GCE “A” level examination results and “college scores” such as interviews and competency tests. Polytechnic students apply to universities based on the grades of polytechnic courses and GCE “O” level examination grades when graduating from Secondary 4 or 5. In addition, Singapore adopts an “autonomous decision” admission method, and universities can independently decide admission results based on students’ academic performance and performance in non-academic activities.