CHICAGO — The city’s nearly weeklong teachers strike appeared headed toward a resolution Friday after negotiators emerged from marathon talks to say they had achieved a “framework” that could end the walkout in time for students to return to class Monday.

Chicago School Board’s David Vitale said the “heavy lifting” was over. He declined to say where each side compromised and stressed that union delegates still must vote to formally end the strike.

Vitale said the agreement gives children the time they need in the classroom and teachers the respect they deserve.

The union scheduled a Friday afternoon meeting of the delegates who would be required to approve any contract settlement with a majority vote.

About 15 minutes after Lewis entered the meeting, delegates could be seen through the windows cheering and applauding, some on them on their feet and pumping their fists in the air.

Journalists were not allowed inside, and there was no way to know what they were applauding.

Robert Bloch, an attorney for the Chicago Teachers Union, said union leaders expected to complete the contract language in time to present a final package to 700 union delegates Sunday.

The walkout, the first by Chicago teachers in 25 years, canceled five days of school for more than 350,000 public school students who had just returned from summer vacation.