A Neshaminy High School history teacher and assistant football coach said Thursday that his car was vandalized after he accused union leaders of bullying and shunning members.

"Maybe it was a coincidence, I don't know," said David Ferrara of Langhorne, who criticized union officials in a letter written for the 654 members of the Neshaminy Federation of Teachers.

After his car was vandalized, Ferrara sent the letter to the school district with permission to distribute it, School Board President Ritchie Webb said.

Ferrara, who has taught in Neshaminy for 15 years and coached for seven years, said his letter "speaks for itself" and declined to comment further.

"In the past four years, the members of the NFT have been subjected to an endless barrage of tactics from our elected officials," Ferrara wrote.

He said that a "small group" of members close to the leaders had conducted "terror and fear tactics in our workplace. Individuals have had damage done to their personal property, they have received written threats, and incidents of bullying during the school day.

"There is a significant amount of shunning led by none other than the elected president of the NFT," Ferrara wrote, referring to union president Louise Boyd.

Boyd could not be reached for comment Thursday. An NFT spokesman said the union does not comment on internal matters.

Ferrara also criticized the union's contractual right to have "equal say" in educational issues to block curriculum reform.

"The elected officials have openly insulted the members of our C&I [Curriculum and Instruction] department in the past and has had no educational reasons to halt many of the initiatives created by professional educators in our schools. Members who speak out to make changes in our delivery of content are ridiculed and so are those who support their ideas."

Webb said in a written statement: "We want to reassure our valued teachers as well as our parents that we are taking all necessary precautions to ensure a safe, productive work environment in Neshaminy."

The teachers have been working without a raise for more than 31/2 years, under a contract that expired in 2008. Their frustration led to an eight-day strike that ended last Friday.

Because of state-mandated arbitration following the strike, contract negotiations have been suspended, starting with Thursday's session, Webb said. Lawyers for both sides will meet to work out details of the arbitration, he said.

Contact staff writer Bill Reed at 215-801-2964, wreed@philly.com, or @breedbucks on Twitter. Read his blog, BucksInq, at www.philly.com/bucksinq.