When there are comparatively fewer teaching weeks in a term, teachers have less time to cover curriculum content and learners have less time for curriculum exploration.
Pan fydd nifer cymharol lai o wythnosau addysgu mewn tymor, bydd gan athrawon lai o amser i addysgu cynnwys y cwricwlwm a bydd gan ddysgwyr lai o amser i archwilio'r cwricwlwm.