Time then has to be devoted upon return to school in the autumn to recover learning which had already been achieved at the end of the previous term [Footnote 14].
Mae'n rhaid wedyn neilltuo amser ar ôl iddynt ddychwelyd i'r ysgol yn nhymor yr hydref i adfer yr hyn a oedd eisoes wedi'i ddysgu ar ddiwedd y tymor blaenorol [troednodyn 14].