The teachers are protesting against the non-payment of their 27.5 per cent enhanced salary scale and N18, 000 minimum wages.
The states are Cross River, Ebonyi, Ekiti, Ogun, Edo, Kogi, Niger, Borno, Benue, Zamfara and Sokoto.
Rising from a meeting in Abuja, the leadership of the union said the affected teachers would embark on what it called “painful strike.”
Addressing reporters in Abuja, the NUT President, Mr. Michael Olukoya, vowed that the strike would continue until the authorities met the union’s demands.
Describing the action of governors of the affected states as “derelict, unpatriotic and self-serving”, Olukoya said they had denied their teachers genuine allowances.
Olukoya lamented that while there was implementation of minimum wages for other categories of workers, the defaulting states deliberately exempted teachers.