Mae gwasanaeth SOS Athro wedi cau.

The SOS Teacher service has closed.

Sut i ddefnyddio SOS Athro

• Cofiwch y medrwch chi chwilio am ateb trwy edrych ar gwestiynau gan fyfyrwyr eraill.

How to use SOS Teacher

• Remember you may be able to come across an answer by looking through previous questions from other students.