MOUNTAIN VIEW — Mountain View High history teacher Frank Navarro — who sparked international outrage after he was put on leave following a lesson in which he drew parallels between President-elect Donald Trump and Adolf Hitler — says he plans to retire in June after 40 years at the school.

Navarro, 65, who has not submitted formal paperwork to the school announcing his retirement, said the school’s handling of the controversial incident spurred his decision.

“I was dismissed as if anything I had to say had no credibility,” Navarro said. “And then I was ordered off the campus as you may order a teenager off campus who had done something. My lesson and discussion of comparison was really pretty basic. There is nothing extraordinary about it and we easily could’ve talked about it.”

Mountain View-Los Altos High School District Superintendent Jeff Harding said Navarro’s status as an employee has not changed following the incident.

“He has not communicated with the district regarding his future plans,” Harding said in an email Wednesday.

Navarro alleges he was asked to leave midday Nov. 10 after a parent sent an email to the school expressing concerns about statements Navarro made in class. He was put on administrative leave with pay for one class period before being reinstated, according to Harding.

In the days that followed, Harding said that the problem was not in Navarro’s pointing out similarities between Hitler and Trump.

In a letter to parents earlier this month, Harding stated that “freedom of expression and academic discourse are the cornerstones of our schools” and also said that “the teacher’s paid leave was not for teaching a lesson comparing Trump to Hitler.” The letter said the district received a complaint and needed to investigate “to ensure the emotional safety of all of our students.”

Harding has also said that the district’s legal counsel and advisers were made aware of the specifics of the case and determined “the district’s actions were appropriate.”

The Oracle, Mountain View High’s independent student newspaper, said in an article on the incident that some of his students claimed his lessons were one-sided and that Navarro said things about Trump that the president-elect’s supporters would find offensive.

Navarro, an expert on the Holocaust, said he’s particularly bothered that school officials declined to share with him the complaint that launched their investigation.

“As of yet, they haven’t told me what they were looking into,” he said.

When he talks about retiring at the end of the school year, Navarro grows quiet. He said he plans to turn in the appropriate paperwork for retirement before the deadline at end of January.

“That form will feel very heavy in my hands,” he said.