This paper examines the psychometric properties of an existing school-based Parent Opinion Survey (POS) in order to investigate its validity as a measure of parent sentiments which may (eventually) be used to better inform the decision making of school leaders. The study focusses on the POS administered by all Victorian public schools at the time of this study, and uses Rasch analysis to identify a subset of items which form a psychometrically robust, unidimensional measure of parent sentiment. We propose that 13 items identified through this analysis could lay the foundation for providing policy makers who currently manage the distribution and collation of this survey, as well as school leaders, with a more reliable and valid overarching POS Scale score. Such an approach could better inform and support the home-school partnership that forms a crucial part of the Victorian Framework for Improving Student Outcomes (FISO) school improvement continuum.