The Pupil Level Annual School Census is an electronic collection of pupil-level and school-level data provided by all maintained schools in January each year.
Mae'r Cyfrifiad Ysgolion Blynyddol ar Lefel Disgyblion yn gasgliad electronig o ddata am ddisgyblion ac ysgolion a ddarperir gan bob ysgol a gynhelir ym mis Ionawr bob blwyddyn.