City Council leaders plan to hold public hearings on the Special Commissioner of Investigation for city schools, including allegations the Department of Education watchdog blocked probes of Mayor de Blasio, his wife and Chancellor Richard Carranza.

“We are discussing internally a plan and date” for the hearings, said a spokesman for Councilman Ritchie Torres, chairman of the oversight and investigations committee.

“I share the opinion that the lack of effective oversight over the DOE is a gaping hole in good government,” Torres has told The Post. “Stay tuned.”

The public inquiry comes after Torres, Councilman Mark Treyger, chairman of the education committee, and Councilman Robert Holden received an anonymous whistleblower complaint by “SCI Investigative Staff,” dated Aug. 20, which charged nine cases involving “top-level executives” were stymied.

After de Blasio fired former Department of Investigations commissioner Mark Peters, who in 2018 tried to seize control of SCI, the whistleblower letter states, “investigations and reports harmful to the administration would be dealt with differently than other SCI investigations.”

Before he got the ax, Peters had hired Anastasia Coleman as the Special Commissioner of Investigation for city schools in February 2018, fired her in March 2018, and reinstated her in October 2018 after an independent investigator concluded that he had abused his authority. The mayor has since taken over the power to hire and fire the SCI chief.

Coleman has denied favoring the mayor and his top appointees, saying, “SCI has not, and will never, slow-walk an investigation based on the subject or the subject matter of the complaint.”

A spokeswoman for de Blasio called charges of City Hall interference in SCI probes “untrue and ridiculous.”

Some of the nine cases pertain to high-profile programs such as de Blasio’s failed $773 million Renewal program for struggling schools. The letter cites “a bloated bureaucracy, systemic contract fraud and implementation of artificial benchmarks” to measure progress.

The letter also cites a case involving “money spent and influence of City Hall” in First Lady Chirlane McCray’s $850 million Thrive program for mental health. Thrive has doled out $145 million to the DOE since FY 2016 for school mental-health clinics, training and consultants, records show.

Exactly which schools got the money and how it was spent is unclear.

Manhattan Borough President Gale Brewer, who has blasted the lack of social workers at some needy schools, told The Post she wants a briefing on Thrive’s expenditures.

Other SCI cases entail “investigations into corruption by Carranza,” the letter states.

One case stems, The Post learned, from a complaint of a “hostile work environment” after a black and Hispanic employee group emailed fellow staffers to attend rallies on May 21 and June 6 and a June 18 press conference at City Hall to support Carranza’s racially-charged agenda.

The complainants said “political activity” during the work day violated conflicts of interest rules and chancellor’s regulations, and intimidated employees into taking part.

“Those of us not in support clearly fear retaliation and retribution,” they wrote in an email to all City Council members.

Councilmen Holden and Joseph Borelli referred the June 19 complaint to SCI and the Department of Investigation. SCI assigned two investigators, who spent hours in July interviewing three DOE administrators who came forward.

The administrators told the probers they felt uncomfortable with the use of a cross-armed gesture described as the Black Panther “Wakanda forever” salute, a symbol of empowerment. They shared photos posted on Twitter showing Carranza and other DOE employees making the gesture.

“It’s promoting an ethnic state of which I’m not a part of and not welcome to,” one of those interviewed told The Post, adding that the salute is also feared as anti-Semitic.

The SCI investigators expressed keen interest in the complaints, according to those interviewed, but expressed doubt the probe would survive. One investigator is quoted as saying, “I’ll take this as far as they let me take it.”

The complainants never heard back.