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Striking Chicago teachers and their supporters attend a rally at Union Park, Sept. 15, 2012.
Chicago - Teachers across the nation's third-largest city will be poring over the details of a contract settlement Tuesday as the clock ticks down to an afternoon meeting in which they are expected to vote whether to end a seven-day strike that has kept 350,000 students out of class.

Some union delegates said they planned to take a straw poll of rank-and-file teachers to measure support for a settlement that includes pay raises and concessions from the city on the contentious issues of teacher evaluations and job security. But many warned the outcome was still uncertain two days after delegates refused to call off the walkout, saying they didn't trust city and school officials and wanted more details.

"It takes a lot to start a strike. You don't want to prematurely end it," said Jay Rehak, an English teacher and union delegate who planned to survey his colleagues at Whitney M. Young Magnet High School before voting at a meeting scheduled for 3 p.m.

Pressure has mounted on the teachers to come to a decision quickly on the tentative contract, which labor and education experts - and even some union leaders - called a good deal for the Chicago Teachers Union.

Mayor Rahm Emanuel, irked by the union's two-day delay in voting on whether to send children back to school, took the matter into court Monday. A judge has called a hearing for Wednesday morning to rule on the city's request for an injunction ordering the teachers back to work.

Widespread support from parents also appeared to be waning as the strike begins to drag. At least one parent group has sprung up and organized to express its frustrations with the kids being out of class after the teachers decided to stay out on Sunday.

"I was very disappointed," said Erica Weiss, who has been dropping off her 6-year-old daughter at a district-organized program each day but has to arrange for someone else to pick her up. She initially supported the teachers strike, but more than a week was "going above and beyond" necessity, she said.

On Monday, teachers' picket lines appeared smaller and a passing jogger even booed the teachers picketing at Mark T. Skinner West Elementary School.

"It's risky to extend the strike when everyone was expecting the strike to be over," said Richard Kahlenberg of the Century Foundation, a nonpartisan think tank in Washington.

But among the pending questions was whether Emanuel's lawsuit would become a new point of contention.

"If he wants teachers back in the schools, he should have stayed away from that type of action," Rehak said. "It only incites."

Both sides have only released summaries of the proposed agreement. But outside observers said the tentative contract appears to be a win on the merits for the union's 25,000 teachers. While teachers in San Francisco haven't gotten an across-the-board raise in years, for example, Chicago teachers are in line for raises in each of the proposed deal's three years with provisions for a fourth. In Cleveland, teachers recently agreed to the same kind of evaluation system based in part on student performance that Chicago has offered.

"The district went past the halfway mark," said Kate Walsh, president of the National Council on Teacher Quality. "They got a pretty good deal."

Some union members in Chicago praised the school district's move on what percentage of test scores will be factored into teacher evaluations, down from the 45 percent proposed to the 30 percent set as the minimum by state law. It also includes an appeals process to contest evaluations. The new evaluations will also be phased in over the length of the contract.

The tentative contract calls for a 3 percent raise in its first year and 2 percent for two years after that, along with increases for experienced teachers. While many teachers are upset it did not restore a 4 percent pay raise Emanuel rescinded earlier this year, the contract if adopted would continue to make Chicago teachers among the highest-paid in the country. In Chicago, the starting salary is roughly $49,000 and average salary is around $76,000 a year.

The city also won some things from the union in the proposed settlement. Emanuel gets the longer school day in Chicago he wanted and principals will have say over who gets hired at individual schools, something the union fought. The district will be required to give some preference to teachers who are displaced and the school district will have to maintain a hiring list and make sure that at least half of hires are displaced teachers.

"We made a lot of progress," said Susanne McCannon, who teaches art at Whitney M. Young Magnet High School. "I'd like to be back in the classroom, but I want to be back in the classroom with the best situation possible."

Associated Press writers Steve LeBlanc in Boston, Terry Chea in San Francisco and Amanda Myers in Cincinnati contributed to this report.