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https://goodpracticeexchange.wales/2013/10/18/gall-disgyblion-ac-athrawon-cyflenwi-helpu-gwella-gwersi-a-gyflenwir-os-gofynnir-iddynt/
Gall disgyblion ac athrawon cyflenwi helpu gwella gwersi a gyflenwir – os gofynnir iddynt