Hasland Hall School has been judged as 'inadequate' by ofsted inspectors- following an inspection in October last year.
It previously had issues including strike action from teachers there, along with an intervention from Chesterfield MP, Toby Perkins.
In a letter to parents on the school's website, the acting headteacher and chair of governors wrote: "Whilst deeply disappointed with Ofsted’s judgement, we recognise that the school must change and improve.
"We are determined to address all areas of concern identified in the report. Since the inspection an Action Plan has been developed, many aspects of which were included in our 2019-20 School Improvement Plan. We continue to work closely with the Local Authority in order to bring about effective change.
"Work has already started on key aspects of the Action Plan. You will be aware that changes were made to our behaviour management routines in December, including addressing lateness to school and lessons. An audit of safeguarding procedures has taken place and our Anti Bullying policy and procedures have been amended in order to make the reporting process more robust, giving students and parents greater confidence in the procedures.
"Developing Teaching and Learning continues to be a key focus. In addition to introducing GCSE Pod, Curriculum Area Reviews are ongoing, facilitated by external staff. Our INSET day in February has a Teaching and Learning focus of metacognition.
"This will build on a recent Learning Sciences Conference that was attended by some of our leaders. We wish to assure you that we are completely committed and motivated to continue to bring about improvements so that everyone can have confidence in the school."