Learners who were ever FSM eligible had lower outcomes than those who were never eligible, even when their home neighbourhoods were similarly deprived.
Roedd gan ddysgwyr a oedd yn gymwys am brydau ysgol am ddim ar ryw adeg ganlyniadau is na'r rhai nad oeddent erioed yn gymwys, hyd yn oed pan oedd eu cymdogaethau cartref yr un mor ddifreintiedig.