After allegations of a 'toxic climate' at Frankford High, the school will have a new principal for the first time in a decade

For the first time in more than a decade, Frankford High is getting a new principal.

Michael Calderone, who has served as Frankford’s principal since 2015, told the staff on Friday that he’s leaving to become the interim principal of Dobson Elementary in Manayunk.

Calderone’s move comes after the district conducted an audit of what some staff said was a “toxic” climate at the school and serious allegations about Calderone, including that he struck a student and retaliated against teachers who spoke out against him.

» READ MORE: ‘Toxic’ climate at Frankford High prompts a Philadelphia School District probe

District officials did not comment on the results of the climate audit, but typically do not discuss personnel matters.

Calderone said, in a letter sent to Frankford staff and obtained by The Inquirer, that the move to Dobson “holds tremendous personal and professional significance for me” because he began his career there, as teacher and dean.

“Returning to lead the school where I first developed my passion for educational leadership feels very much like a homecoming and has always been a dream of mine,” Calderone wrote.

Noah Tennant, the interim associate superintendent for secondary schools, said in an email to Frankford staff that Calderone “is a school leader with a proven track record of improving student outcomes, leading school transformation, and building collaborative systems. His leadership and contributions to the Frankford High community will leave an indelible impact on all he served.”

Mary Jackson, a retired Philadelphia principal who’s served as Frankford’s interim leader in the past, will be “guest principal” while the district searches for a replacement for Calderone, Tennant said in the letter.

“In the coming months, the district will initiate a process to identify the next permanent principal who will continue the important work underway and ensure every student and staff member is supported,” Tennant wrote.

The first public hint of controversy happened in early 2026, when Frankford’s budget, like spending plans across the school system, was shrunk because of district-wide cuts. Calderone ordered a number of teachers’ jobs cut out of seniority order, a move that was protested by the Philadelphia Federation of Teachers, and ultimately overturned.

The PFT and teachers say the targeted educators — whom Calderone said he moved to advance academic goals — were ones who had spoken out against him, they told The Inquirer.

At the same time, a number of current and former Frankford staff raised allegations about significant culture issues at the school, and the district conducted the audit.

According statements from multiple staffers made to the district and PFT and obtained by The Inquirer, Calderone, who earned citywide recognition for his work at the comprehensive high school, was a volatile leader who forced out many capable staffers.

Some staff said the principal screamed at adults and students on multiple occasions. They also said he made improper requests, including asking teachers to provide grades for students in classes they did not teach.

Others said he spoke openly about intentions to get rid of staff members who were not allies, to force out staff who he believed were opposed to him.

Two staffers also told the district that Calderone punched a student who had assaulted multiple Frankford staffers. The staff did not report the assault when it happened because they were afraid for their jobs, they said.

Other Frankford staffers agreed that there was widespread discord at the school, but say those who opposed Calderone contributed to the toxicity.

Arthur Steinberg, PFT president, who had previously said that he did not believe Calderone was fit to run Frankford “or any school at all,” in a statement Monday commended the Frankford staff who brought concerns to the administration.

“Thanks to their bravery and persistence, Frankford will be a healthier, more positive place to learn and work for all,” Steinberg said. “It is our hope that whoever is assigned to replace Dr. Calderone is able to reset the working environment for staff, so that Frankford is once again the warm, welcoming school community it was before he arrived.”

Calderone, in his letter to Frankford staff, said he was particularly grateful for the community’s resilience during a tough time — the hulking main Frankford building was shut for multiple years because of asbestos issues, with students scattered between multiple buildings. He said he was also proud of Frankford’s aviation and hospitality programs, launched during his tenure at the school.

“Thank you for your trust, your partnership, and the memories we have shared,” Calderone wrote. “I have every confidence that Frankford High School will continue to thrive and achieve great things. I wish you all the absolute best. Frankford will always be the ‘Home of Champions’. But never forget: every champion was once just a contender who refused to give up. I ask you to carry that relentless, unbroken spirit with you into every new day. Thank you for letting me walk this path alongside you.”

Calderone will be moving to a very different school than the one he’s led for 11 years.

Frankford educates about 900 students in its massive Oxford Avenue building. Dobson, a K-8 on Umbria Street, educates about 250, though both have large populations of students with disabilities.

Dobson’s former principal, Khloe Williams-Lawani, accepted another job in the school system.