A last push as area school teachers prepare for strike action.

Union NZEI has agreed to join the Post Primary Teachers Association in rolling strikes from next Tuesday to Thursday.

It's also opted to ban covering relief teacher work.

NZEI President Mark Potter told Kate Hawkesby this action is necessary, as they haven't had an offer from the ministry since last year.

He says rolling strikes might have an impact on students, but the impact will be even greater if teachers resign.

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