Sarah Briggs, the 15-year-old Nottinghamshire schoolgirl who was expelled for criticising her teachers, has been reinstated.
She will be allowed to return to the 400-year-old Queen Elizabeth Grammar School in Mansfield when the term starts next month.
The decision was taken at a meeting of school governors, senior teachers and the family solicitor last week.
Sarah was expelled after refusing to apologise for a letter she wrote to her local newspaper claiming that teachers were taking too much time off work, affecting pupils examination work. The school's action was criticised by Stephen Byers, the schools standards minister and Chris Woodhead, the chief inspector.