A Jersey teachers union, the NASUWT, says the new pay offer from the States Employment Board is "unacceptable".
It comes just hours after the island's other teaching union - the National Education Union - voted to accept the offer.
95% of their members who attend the meeting on Monday night, voted to end the dispute.
- READ MORE: NEU members vote to accept new pay offer
The offer includes an additional consolidated increase to salaries of 0.8% from January.
This is on top of the 4.4% rise put to teachers in last week's offer.
The proposed agreement includes the following:
- 2018: 2% consolidated increase plus 1.1% non-consolidated cash payment
- 2019: 2% consolidated increase plus 1.0% non-consolidated cash payment
- 2020: RPI + 1.3% consolidated increase, plus an additional 0.8% funded through reforms and sustainable efficiencies.
The offer aimed to end the long-running dispute between the two teaching unions and Jersey's States Employment Board (SEB).
The General Secretary of the NASUWT says they've welcomed improvements to the offer, but still find it unacceptable.
The NASUWT will now consult with its members on next steps, including potential escalation of its industrial action.
In a stated the States Employment Board said:
The SEB are meeting later this afternoon to consider their position and will respond further in due course.