East Brighton college of media arts
Inspectors visited the former Marina high school in April. They found that pupils made satisfactory progress in only just over half of lessons, a third of teaching was unsatisfactory, staff moralewas low and pupil behaviour poor.
They criticised the leadership of former principal Tony Garwood, who has since resigned.
In a statement, the college said it "has taken action to make improvements in the key areas of leadership and management; raising standards; improving behaviour; staff recruitment and raising attendance".