PATERSON, N.J. – A New Jersey teacher who allowed his students to watch pornography in class has lost his teaching certificate, six years after the alleged incident occurred.

The New Jersey Board of Examiners decided Paterson Public Schools teacher Robert Carter deserves a “severe penalty” for numerous allegations of misconduct dating back to 2009 and revoked his teaching certificate at a recent hearing, NJ.com reports.

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The board ruling stems from Carter’s appeal of an arbitrator’s ruling in 2013 that recommended the teacher lose his job for incompetence, using profanity with students, and losing his temper in class.

The arbitrator’s found that the tenured teacher would swear at students, threw a chair on the floor to get their attention, and failed to supervise students close enough to catch them watching pornography, The Record reported at the time.

“He creates a classroom as a battleground rather than a supportive and nurturing environment,” arbitrator Mattye Gandel wrote in the 2013.

Carter also reportedly took bereavement leave to mourn the death of pop singer Whitney Houston.

Carter joined Paterson schools in 1997 and his personnel file shows he struggled to control students and was given several mentors to help improve in 2009. The district’s complaint also cited a parent’s allegation that Carter assaulted a student during in-school suspension, though Carter told the Division of Youth and Family Services he simply grabbed the student by the arm and sweatshirt to stop the fight, according to the news site.

Carter did not face criminal charges in that case, but Gandel wrote that the incident reflected the teacher’s difficulties controlling students.

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Paterson officials also alleged Carter pushed a student on the stairs, scolded a diabetic student for not finishing his lunch, and called another student “your fat self.”

Carter disputed the district’s claims and the arbitrator’s findings, alleging they were based on “hearsay evidence” that was based on lies.

His attorney, Ronald Ricci, vowed to appeal the arbitrator’s ruling on the basis that the district did not provide a witness list in the case fast enough, and administrators were mean to Carter and forced him to teach students assigned to in-school suspension – “the worst classroom with the worst students.”

“You have haters,” Carter told The Record. “I’m a Christian.

“I’m fighting for my job,” he said. “I have to. I’ve been fighting all my life, ever since I stepped into a classroom as a teacher.”

That fight ended with the state’s Board of Examiners officially revoking his teaching privileges this year.

Carter’s case was the first in northern New Jersey to go through an expedited process for removing tenured teachers put in place by Gov. Chris Christie. Union job protections in New Jersey and other states make it very difficult and expensive to remove tenured teachers, for whatever reason.

In the past, it took years of litigation and cost New Jersey school districts hundreds of thousands of dollars to terminate misbehaving educators, but the new law requires the state to resolve cases within five months, with certain exceptions to appeal an arbitrator’s ruling, according to The Record.

Carter, who is now 54 and hasn’t taught in Paterson schools since 2013, worked at School 24 and the Alexander Hamilton Academy, NJ.com reports.