Turning to Mrs Perry's family, the coroner said: "The composure and dignity you have displayed throughout is remarkable.
"She is your Ruth, not our Ruth."
An inspection report, published on Ofsted's website in March, found Ms Perry's school to be "good" in every category apart from leadership and management, where it was judged to be "inadequate".
Inspectors said school leaders did not have the "required knowledge to keep pupils safe from harm", did not take "prompt and proper actions", and had not ensured safeguarding was "effective".