When a learner was matched to their school record, their eligibility for free school meals in secondary school (Years 7 to 11) was used to calculate the following measures:
Ar ôl paru dysgwr â'i gofnod ysgol, defnyddiwyd ei gymhwystra i gael prydau ysgol am ddim yn yr ysgol uwchradd (Blynyddoedd 7 i 11) i gyfrifo'r mesurau canlynol: