Secondary school teachers will ballot next month on Junior Cycle Reform.
Both the TUI and the ASTI have agreed to ballot their combined 27,000 members who work at more than 700 second-level schools.
It is unclear at this stage what position their respective executives will take.
The ASTI executive will meet on Saturday whether to recommend acceptance.
Their ballot result will be announced on September 24.
Diarmuid De Paor, Deputy General Secretary of the ASTI has said that there has been progress on the main sticking point.
"The biggest issue was the issue of assessment, and then there were issues over time, teachers keep saying, 'please, please just let us teach instead of having thousands of meetings about nothing'," said Mr De Paor.
"Those issues in terms of time and resources have been addressed and it's up to the members ultimately to decide whether they are satisfied."