The story of gentrification is nothing new in Philadelphia and city officials, along with some developers, are working to avoid displacement and other pitfalls.

In April, for example, the Philadelphia Housing Authority completed 55-affordable housing units along 33rd Street in Strawberry Mansion.

City Council President Darrell Clarke said gentrification is something that is nearly unstoppable and can even be a good thing so long as equitable development is part of the process.

“The reality is you want to encourage new investment,” he said on Saturday. “The question is can you make sure that the neighborhood continues to be affordable for the residents that live in here and the people that want to live in here.”

Some who came out to celebrate on Saturday were still coming to grips with the School District of Philadelphia’s transition of the community’s 54-year-old alma mater, Strawberry Mansion High School. This year, the school will phase out its comprehensive 9-12 programming and begin offering alternative education programming.

The District said the changes are designed to serve the community — since most young people in the area are enrolled in alternative programs.

But some vocal Strawberry Mansion residents, many of whom were alumni, saw the changes as an omen. These critics have said that the District didn’t involve residents in the decisionmaking process. Soon after the District announced the school’s reprogramming, residents began a campaign to “save Strawberry Mansion High School.”

“The community has to realize that they must speak up for the community,” said Tyrone Williams, a recently retired community liaison for the Strawberry Mansion Neighborhood Action Center.

“Because if they don’t, a community without a plan will definitely get planned for.”

Five years ago, residents fought a similar battle and won, when the school was removed from the closure list. Among the opponents to that closure was Council President Clarke.

He was far more optimistic about current plans to revamp the high school.

“There wasn’t the appropriate opportunities being offered in that school,” he said. “We’re now doing that, and we expect the population to continue to grow.”

The massive building, estimated at nearly 300,000 square feet, once housed 1700 students. Over the years that number has dwindled to less than 300.

The District has said that as plans move forward at Strawberry Mansion High, it intends to involve community members along the way.

Tanya Parker is a lifelong resident of the neighborhood, and a community activist. On Saturday, she said the changes at the school trace back to the larger cycles of reinvestment and displacement happening in the area. She said it is important to educate people in the community about what’s going on and move beyond divisions to fight for common goals.

“Some folks just don’t care because they don’t live down here anymore,” she said. “Then you have the seniors who’ve been telling us all the time that this was coming and now it’s here. Then you have the new generation, which does not have the communication skills to reach over our obstacles of differences. So we’re just in the struggle.”