Merthyr Tydfil had the highest rate of EOTAS pupils in 2023/24 with 10.4 of every 1,000 pupils mainly educated outside school.
Mae’r gyfradd o ddisgyblion sy’n derbyn eu prif addysg heblaw yn yr ysgol wedi cynyddu i 3.4 allan o bob 1,000 disgybl.