Those who cheat forfeit the respect of others. This is particularly grievous in the case of headteachers. They and chairs of governors must be publicly accountable for publicly professed pledges.
In resigning, the head guilty of doctoring her pupils' SATs answers earlier this summer took the only honourable course.
It could be argued that moral education has limitations in changing moral behaviour. Despite assembly homilies and discussions in ethics lessons, words and actions are not always the same.
I suspect there will always be those in any system who seek unfair advantage.
Ronald Impey Exeter, Devon