Mae disgyblion Blwyddyn 11 o bob rhan o Gymru wedi bod yn cymryd rhan mewn ysgol haf breswyl a ariennir gan Lywodraeth Cymru fel rhan o raglen Sylfaen Seren.
Year 11 pupils from across Wales have been taking part in a residential summer school funded by the Welsh Government as part of the Seren Foundation programme.