The ASTI has pulled out of talks for this years Leaving Cert plans and labelled the plans as unacceptable.
Last week the Department of Education said two possibilities were being considered for the class of 2021.
One is full written exams, with modifications to the papers to provide further choice.
The other is an alternative option that could include calculated grades, but would also take more account of factors such as practicals and orals.
However, the ASTI says it is withdrawing from discussions on the Leaving Cert 2021.
The union says it wants a guarantee that the talks will focus on the Minister’s stated objectives of planning for examinations and scoping out a corresponding measure.
ASTI General Secretary Kieran Christie said it is unacceptable that a plan is being developed which will effectively see students preparing for two versions of a Leaving Cert, with Calculated Grades being the dominant option, and the Leaving Cert exams filling in assessment gaps.
Mr Christie says “It is clear to us that the approach being developed would not provide the meaningful Leaving Certificate experience this cohort of students deserve."
The ASTI will continue to engage constructively with the re-opening of schools process.