Freeform written personal development journals are used within the Radiation Therapy (RT) program at the University of Newcastle to promote reflection on practice. The journals are developed by students on completion of each semester based professional placement (clinical placement). To evaluate the level of reflection within journals the Newcastle Reflective Analysis Tool (NRAT) was developed. The NRAT allows for both narrow and broad classification of reflective writing, useful for formal and informal reflective writing assessments. This paper provides validation of the NRAT in the assessment of freeform reflective writing and its use in the assessment of reflection in RT student journals. The results also indicate the need to introduce interventions to foster students’ reflective writing ability within the RT program. As a result of these findings the Newcastle Reflective Inventories (NRI) have been developed. The NRIs are short form guided inventories aimed at assisting students with their reflective writing development.