Parents of students at three south Dublin private schools are threatening legal action after external examiners cut Leaving Cert grades for projects marked by teachers.
The State Examinations Commission marked down Agricultural Science projects 20 per cent at the Dublin Academy in Killester.
The Irish Times reports Ag Science grades were also cut at St Michael College and St Andrew's on the southside -- and they can't appeal.
Students are required to show they have gained practical experience in crops, livestock, and in laying out a farm.
They're also required to keep scientific notes on their work for continuous assessment over two years.
The exams body says grades may be marked down if they don't tally with national averages -- but parents say it's is infringing on their children's constitutional rights.
Some parents claim their children have missed out on college places because of being marked down.
