NSW public school teachers will stop work on Thursday morning to vote on a proposed industrial agreement with the NSW Department of Education, meaning there will be minimal supervision for the first few hours of school.

Teachers have been asked to arrive at school by 8.30am for an 8.45am meeting to discuss a new award covering salaries and conditions. Stop work meetings are traditionally held close to the end of negotiations.

Schools that have already planned an event, such as a concert or year six picnic, will be exempt, The Sydney Morning Herald understands.

Other schools will have minimal supervision until the close of the meeting, which is expected before 10.30am.

A spokesperson for the NSW Department of Education said schools will be open on Thursday and all students will be supervised during the NSW Teacher's Federation meeting.