It's understood the grades being handed out on Monday will be better overall than if students had sat the traditional Leaving Cert.
But points for college courses will rise as a result, leaving some students disappointed.
Education Minister Norma Foley is due to appear before the Oireachtas Covid-19 Committee this afternoon to discuss school reopening and the calculated grades process.
ASTI General Secretary Ann Piggott says we won't know if the grades system has avoided disaster until next week:
