Students applying to junior colleges will be assessed based on an L1R4 aggregate, instead of the current L1R5. SINGAPORE: From 2028, students seeking admission into junior colleges will be assessed based on five O-Level subjects instead of six, the Education Ministry announced on Thursday (Mar 6). Under the current L1R5 criteria, students must attain a score of 20 or better across six O-Level subjects to qualify for a junior college (JC). The L1R5 aggregate includes one language subject, one