Changes to special educational needs (SEN) data following the Implementation of the Additional Learning Needs (ALN) and Education Tribunal (Wales) Act 2018
Newidiadau i ddata anghenion addysgol arbennig (AAA) yn dilyn Gweithredu Deddf Anghenion Dysgu Ychwanegol (ADY) a’r Tribiwnlys Addysg (Cymru) 2018