Secondary school teachers have rejected their latest pay offer.
The teachers, whose current agreement expired on Wednesday, have been offered a 1.5% pay rise for one year and a 1% increase the following year.
The president of the Post Primary Teachers Association, Kate Gainsford, says that that's below the rate of inflation and is therefore, in effect, a pay cut.
She says the offer also included a requirement that teachers do more work when students are not at school, which is offensive.
A decision will be made later this month on whether to call stopwork meetings to discuss possible industrial action.