Scotland's largest teaching union has issued formal notices to councils confirming a statutory strike ballot will open on 12 October.
The Educational Institute of Scotland (EIS) will move to take industrial action if members back the strike.
It follows a consultative ballot where 94% of teachers voted to reject a 5% pay offer and 91% said they would strike in pursuit of a better pay deal.
The EIS said it was confident members would "vote overwhelmingly" to strike.
