The first year that students sat for the PSLE under the new Achievement Level (AL) scoring system was in 2021. Under the new system, there are eight ALs, AL 1-8. The new AL scoring differs from the T-score system and results from the two systems are not comparable. As such, a new series of statistics was started from 2021 PSLE. The T-score series before 2021 PSLE are available on Data.gov.sg.