A former headteacher on Anglesey had been found guilty of unacceptable professional conduct.
However, an allegation that Ann Hughes was excessive in inviting a police officer to reprimand pupils when they did not pose for a school photograph was not proven.
Mrs Hughes faced eight allegations at a General Teaching Council for Wales hearing in Flintshire.
Two accusations - that she failed to maintain a co-operative working relationship between staff, and failed to ensure effective communication within the school - were judged to be proven against her by the panel.
Two other accusations - that she failed to properly investigate incidents of bullying, and failed to ensure with parents effectively - were judged to be partly proven.
Four further accusations were not proven, the panel ruled.
More top news
A night of two halves - cold under clear skies in the south, with cloud and mist around the hills in the north!
The partner of a man critically injured in a crash in Cardiff has appealed for witnesses to come forward.
There are calls for the Welsh Government to change the law to force councils to collect rubbish at least once a fortnight.