A man found to have been repeatedly restrained and once detained for nearly five hours at his former school will receive £18,900 in damages.
He was a pupil at the Mulberry Bush School in Standlake, Oxfordshire, more than a decade ago but the claim was decided at the High Court on Friday.
A judge found he was restrained face down by staff three times and that others placed a towel around the door of his room to stop him leaving it 14 times.
The private residential special school said it was "naturally disappointed" by the outcome and that it was "potentially seeking permission to appeal".