A damning new report on yeshiva schools in the city found that just two of 28 provided adequate secular education to their students, the Department of Education revealed Thursday.

At one of the Jewish religious schools, DOE investigators found no instruction at all into basic subjects such as math, English, history and science.

“One of these schools stated that they did not offer any courses in secular studies,” the report states. “The school stated that it uses Jewish Studies texts in all aspects of the curriculum and that within Jewish Studies, ELA, mathematics, social studies, civics, science, hygiene/health, physical education and art are covered.”

The DOE found varying levels of compliance, with some yeshivas offering a range of secular subjects while others admitted to not housing a single textbook in English.

“The Department of Education report reaffirms what we already know: that tens of thousands of children in New York City … are being denied a basic education as required by law,” said yeshiva critic Naftuli Moster of the group YAFFED.

While the DOE’s primary findings were stark, the report insisted that most of the schools were making authentic efforts to incorporate more non-religious material into classrooms.

Of the 28 schools, only two provided instruction that was “currently considered substantially equivalent” to state educational standards, the report found.

Another nine were “moving towards” that goal, 12 were “developing” in that direction and the remaining five were “underdeveloped,” according to the report.

“The DOE and the schools in question have accomplished a great deal so far,” the report said, crediting yeshiva organization PEARLS for developing secular coursework being phased into the religious schools.

The group was defiant in the wake of the report’s release Thursday and took the opportunity to question the DOE’s own ability to adequately educate city kids.

“The yeshiva system continues to outperform the City’s public schools by every metric, including higher graduation rates, better test scores, greater attendance and more positive outcomes,” PEARLS said in a statement. “The New York City yeshiva system is comprised of 275 independent schools. As with all school systems, yeshivas always strive to improve and adopt best practices.”

But critics argue that yeshivas are leaving thousands of city kids bereft of basic academic education and leaving them ill-equipped to manage in the outside world.

“YAFFED has spent years calling for the release of this report while a generation of students has graduated into adulthood without the skills needed to attain work, support families and advocate for themselves and their community,” Moster said. “No apology will undo this damage; we urge the city to take immediate action to ensure every child in New York City receives an education to which they are entitled under the law – regardless of the type of school they attend.”

Compounding Moster’s anger, city investigators revealed Wednesday that Mayor Bill de Blasio was aware that his administration sought to delay the release of the DOE’s report until after he secured an extension of mayoral control of city schools.

Moster ripped that revelation as a “disgrace” this week.

State Assemblyman Simcha Eisenstein (D-Brooklyn) minimized the report’s findings, and claimed the study as a vindication of the city’s yeshivas.

“The New York City Department of Education’s report completely and rightly confirms what we have been saying since day one,” he said in a statement Thursday. “This entire issue is a fabricated claim by a group of so-called advocates making baseless accusations against the entire yeshiva system.

“Now that we know that out of 275 yeshivas in New York City, a handful need additional resources, let’s see if these so-called advocates will join me in advocating for additional government resources to help the 1% improve,” he said in a statement.