NEW YORK – The United Federation of Teachers’ attempt to show the world schools can thrive under New York City’s teachers contract continues to falter.

The United Federation of Teachers Charter School K-8 Academy – a union-run charter school in Brooklyn – was one of only two of the city’s 1,693 schools to receive the lowest possible score in every category rated by city education officials, the New York Daily News reports.

The school was “not meeting target” in student achievement, school environment, student progress, and closing the achievement gap for black and Hispanic students in School Quality Review reports issued by the city Monday, according to the news site.

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“Clearly there are major challenges in the middle grades, which we continue to work on,” UFT Charter School board president Evelyn DeJesus told the news site.

Those “challenges” have plagued the school for years.

This time last year state charter school authorizers warned UFT leaders that they would need to dramatically improve student performance by 2015 or the school could be shut down forever, according to GothamSchools.org.

American Federation of Teachers President Rhonda “Randi” Weingarten started the school in 2005, when she was president of the UFT, to prove teachers unions know what they’re talking about when it comes to education.

But, as Gotham Schools noted last fall, “seven years into its existence, the nation’s first union-run school was one of the lowest-performing schools in the city, and its position did not improve when the state released its first round of scores from tested aligned to new Common Core standards” in the summer of 2013.

UFT Charter School officials decided last year to move middle schoolers from the high school campus to the elementary school campus, which DeJesus described as an “important” step toward improvement in a letter to parents.

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“Many schools facing similar problems with middle school performance report success with a K-8 format. We believe this change preserved what is strong in our elementary academy while giving our middle school students the academic, social and emotional support they need to thrive,” she wrote.

Obviously UFT officials didn’t do their homework, as the school’s marks went from bad to worse over the last year. Only one other school in New York City – Foundations Academy – failed students across the board, the Daily News reports.

The Wall Street Journal reports that the UFT Charter School is “operated as one school but treated as two schools in the rating system” and “fared better at the high school level.”

“Last spring 11% of K-8 students passed state tests in English language arts and 18% did so in math. Especially at the middle school grades, its performance lagged behind most district and charter peer schools serving student bodies with similar rates of poverty, disability and children learning English, according to the new data,” the news site reports.

New York City Charter School Center CEO James Merriman described the school’s results as “just sad.”

“Given the school was supposed to be a proof point for union expertise, for the UFT to let it fail so badly strikes me as educational and political malpractice,” he told the WSJ.

A spokeswoman for Weingarten brushed off the poor performance.

Weingarten “hadn’t been involved in a long time” with the school, she said.

The Charter Schools Institute at the State University of New York is expected to recommend whether or not to renew the school’s charter in February or March. If the charter renewal is declined, the UFT Charter School will be forced to shut down after the current academic year, the WSJ reports.