A school has been given a "termination warning" after homophobia and bullying claims were made by pupils.
The potential notice to close follows claims of bullying and derogatory language.
An Ofsted report into Ark Kings Academy in Birmingham, West Midlands, was damning in its findings.
The warning was issued after inspectors found secondary pupils did not feel safe.
BirminghamLive reports claims of "bullying, derogatory language and homophobic behaviours are commonplace" at the academy.
Pupils also had "no confidence that staff will support them when they raise concerns" and "lesbian, gay, bisexual and transgender (LGBT) pupils experience repeated discriminatory behaviour against them", Ofsted found.
The Department for Education said the school's leaders had not recognised these issues so they could not take the "right steps" to prevent them.
The school Ofsted report highlighted how pupils said there were "high levels of bullying and prejudiced behaviour" which went unrecorded.
"Pupils feel that they have to tolerate the frequent sexual harassment towards them," the report said.
It added: "Some pupils, particularly those who identify as LGBT, experience repeated name-calling and prejudiced behaviour.
"This means that pupils do not feel safe in the school."
The Kings Norton school was told it must improve in areas including truancy and safeguarding, which was branded 'ineffective'.
Ofsted also noted that pupils with special educational needs and disabilities were also more likely to receive sanctions than their peers, with a "high and increasing" number of suspensions.
It judged the academy, which educates pupils aged three to 16, to be inadequate, and said school leaders did not make "adequate checks" on pupil absences, while "too many pupils are truant from lessons".
An Ark Academy spokesperson said: "Whilst very disappointed with the inspection judgment, we fully accept the findings of the inspection report.
"We had identified many of the issues prior to the inspection and had taken action to begin to address these ahead of the inspection.
"That work has gathered pace since, and we are very confident the school will improve rapidly over the coming months.
"We have appointed an executive principal and a new secondary principal to lead this work and the school will have the support and resources of our large, successful network to ensure all pupils experience a consistently high-quality education."
