One school stopped music and drama lessons as well as Christmas and Diwali celebrations, and subsidized trips to Saudi Arabia for Muslim students.

In another school, the report found, girls and female teachers were discriminated against, and compulsory sex education, including discussions about forced marriage, was banned. Girls and boys seen talking for too long or considered flirtatious were reprimanded, while boys were given worksheets that said a wife had to obey her husband.

The report, released in July, highlighted Mr. Bains’s case and concluded that there had been a “coordinated, deliberate and sustained action, carried out by a number of associated individuals, to introduce an intolerant and aggressive Islamic ethos into a few schools in Birmingham.”

Muhammad Khan, the chairman of the board of governors at the time, who is no longer at the school, did not respond to repeated requests for comment. Three governors who were also present at meetings with Mr. Bains also refused to comment on his allegations.

Muslim leaders in Britain have condemned the report’s findings, saying it was wrong to conflate conservative Muslim practices with an alleged agenda to Islamicize school systems.

Mr. Bains, 47, was born to Indian immigrants in a suburb of Coventry notorious for prostitution and violent crime. He grew up listening to stories of how his father, a teacher in Punjab State, walked 30 miles each day to and from school. He would study by candlelight because his village had no electricity. After arriving in Britain and securing work as a laborer, he put his son and daughters through college.

“It made me value education more, and because it is free in this country,” Mr. Bains said. “I lifted myself out of poverty because of education. If I could do it, if I could break the cycle, other children could, too.”