Bristear ar dhóchas . . . . The optimism (dóchas) of teachers and pupils is diminished when (nuair) the content of the courses does not suit the ability or interest of the pupils.

Bristear ar dhóchas . . . Hope is diminished. Verbs in Irish change their meaning if prepositions follow them. Here bris - - break becomes bris ar - - take from, diminish. Bristear is an briathar saor of the present tense.