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OAKLAND — Following Day 2 of a strike Friday at 86 Oakland public schools, teachers, parents and students headed into the weekend wondering whether school district and union officials who had resumed negotiations in the morning were getting any closer to reaching an agreement.

Talks broke off shortly after 10 p.m. but are expected to resume Saturday. Oakland Unified School District spokesman John Sasaki confirmed that negotiations would continue into the weekend and Oakland Education Association President Keith Brown, in a video message posted on the union’s social media pages, said updates would be given at a 6 p.m. news conference Sunday

“We will remain on the picket lines until we see a proposal that addresses the changes we must have for our students,” Brown told reporters Friday morning at a rally outside Roots International Academy in East Oakland, one of as many as 24 schools the district may close over the next several years because of declining student enrollment and a looming $30 million-plus budget shortfall.

Brown declined to say whether union negotiators planned to make a counter offer to the district’s latest proposal at Friday’s talks. “Our bargaining team is coming in in a position of strength,” he said. “They represent what the community wants for public education in Oakland.”

VIDEO: Day 1 of the strike started off with 3,000 Oakland public school teachers and their supporters at all of the city’s 86 public schools, according to the Oakland Education Association.

Brown said that if the district does not make an offer to end the “teacher retention crisis,” picket lines will reform Monday.

Sasaki said Oakland Unified was hoping to receive a new proposal from the union after improving its offer. “We are really hoping to reach a resolution quickly,” he said.

Roughly 3,000 teachers, counselors and nurses started their strike Thursday, which resulted in many of the district’s 37,000 students staying away from classes, where fill-in teachers and administrative staff were left to supervise.

The teachers union has been seeking a 12 percent pay bump over three years, and the administration’s latest publicly disclosed offer has included a 7 percent raise retroactive to Jan. 1, 2019, and lasting through June 30, 2021, plus a 1.5 percent one-time bonus. It initially offered a 5 percent raise over three years.

Teachers also want the maximum class size to be two students smaller, while the district has offered to reduce the maximum size of most classes by one student and those with the “most vulnerable” students by two.

After a second morning rally, this one at DeFremery Park in West Oakland, Brown led hundreds in a march to the headquarters of GO Public Schools, an education group that advocates for both charters and district schools, to “show them we stand with the people, we stand with the students.”

GO Public Schools has incurred the Oakland Education Association’s wrath by backing district policies criticized by the union, such as the “community of schools policy” passed last year calling for more coordination between district and charter schools. The group also supported Oakland Unified’s “blueprint for quality schools” plan to reallocate resources to improve school quality in part by closing under-enrolled schools as a last resort.

“No doubt, every story requires a villain. But we are not in a fight with Oakland’s teachers — many of whom are our friends and former colleagues,” Jessica Stewart, executive director of GO Public Schools Oakland, said in a statement issued to this news organization. “We too are angry, and have been consistently and repeatedly vocal about how underpaid our teachers are. We too are disgusted with the shameful underfunding of public education in California. But one-liners and simplistic slogans will not solve these complex problems. It will take educators and parents and community members working together — which we have been doing for the past ten years.”

The nonprofit also issued a news release about an incident early Friday alleging that a group of people carrying cameras banged on the door of one of its leaders, “frightening” his family. Go Public’s CEO, Jonathan Klein, identified himself as that leader, writing about the incident in a Facebook post Friday. The door bangers allegedly left leaflets related to the Oakland teachers strike around the neighborhood, signed Oakland Community Members, the news release said.

Oakland Education Association Vice President Ismael Armendariz said that incident was not sanctioned by the union and noted tensions are high among community groups.

Maddie Ranson, a kindergarten teacher at Achieve Academy, said in a morning press conference that several charter schools in Oakland support Oakland Unified school teachers, including Achieve Academy, Arise High School, Roses in Concrete and Epic, among others. At Achieve, 24 of 35 teachers participated in a “sick out” on Friday, she said. At Arise, 70 percent of teachers joined strike efforts Thursday and Friday.

“As educators from charter schools, we stand in solidarity with you, OEA, and we won’t back down until we win,” Ranson said.

Many teachers on the picket lines Friday expressed concern over the growth of charter schools in Oakland in light of the district’s plan to close up to 24 district schools. The school board voted last month to close Roots, despite fierce opposition from families and teachers.

“School closures are not only the wrong direction for students and families — they don’t work,” Chela Delgado, a teacher at Coliseum College Prep Academy, said at a rally Friday morning outside Roots. Citing studies of school closures in major cities such as Philadelphia, Delgado said that when a district closes schools, “students do not attend better schools and they do not save money in the long run.”

The union did not address school closures in its original contract proposal but asked to include the issue in negotiations before the school board voted to close Roots. Lawyers for the district said at the time it wasn’t appropriate to talk about school closures in bargaining.

Many teachers said in interviews Friday that while they’re worried the indefinite — and unpaid — strike could stretch their pocketbooks, they’re willing to hold out.

“Of course I’m worrying financially” during the strike, Castlemont special education teacher Mara Randle said, “but I’m already struggling financially with the paycheck that I’m getting.”

Christina Walker, Castlemont’s school psychologist and an Oakland Unified alumna who remembers missing weeks of school during the 26-day teachers strike in 1996, said she isn’t willing to budge from the union’s demands for better pay, smaller class sizes and more student support services.

“I’m in it for the long haul,” Walker said. “As long as it takes.”

But Castlemont math teacher William Matthews indicated he’s not as inclined to stick it out. Matthews said he thought the district’s latest offer was “pretty decent” and he does not want the strike to turn into a “power struggle” between the union and the district.

“If the district puts forward a good deal and OEA rejects it, personally I’m going to have to cross,” he said.

This is the third Oakland teachers strike in 23 years. In 2010, teachers picketed for one day, and another one in 1996 lasted 26 days. The strike comes in the wake of a week-long one in Los Angeles last month and another earlier this month in Denver that ended after three days.

Meanwhile, Berkeley teachers, staff and others are planning a day of action in support of Oakland teachers by staging rallies and “walk-ins” before school starts on Tuesday.

“We stand in unity with our fellow teachers and school workers in Oakland, who are taking a critical stand for the future of public education,” Matt Meyer, vice president of the Berkeley Federation of Teachers, said in a news release. “It is time for the Oakland Unified School District to immediately settle a contract with Oakland educators that invests in students and fully supports educators. Instead of austerity for Oakland students and teachers, it is time for real leadership from the OUSD.”

Check back for updates to this developing story.