The Princeton School Board and the teachers union met Thursday night, March 26, but did not come to an agreement on a new contract.
School board representatives and union negotiators are scheduled to meet with a mediator for the fifth time on April 9.
The two sides are not commenting publicly about negotiations, based on the recommendation of a state appointed mediator.
Teachers in the Princeton Public Schools have been working under the terms of an expired contract since July. The two sides have been unable to agree on health insurance contributions and salary increases.
Frustrated parents have been calling on both sides to compromise and end the stalemate.