Regarding format:
How many schools do or would hang up posters relating to professional practices of staff? Might postcards be a more appropriate format than posters since they take less space so would be easy to just keep by your desk? Or, are there other formats that people like?
Regarding Audience:
Where may the most influence sit in relation to adoption of positive guidance and professional practices? At the administrative level? At the teacher/related services/support staff level? At the teacher-training program level? Is there any one audience of greatest impact to try to reach with limited resources, or are they all integrally linked so you really need to work on getting to them all?