This study explores the outcomes of reflective journaling among novice Graduate Teaching Assistants during the initial stages of their professional development. It seeks to establish whether there were common concerns addressed in their journals and if different levels of reflection were achieved. By means of content analysis of 177 entries, nine common themes were identified. Among these, "methodology" and "classroom management" were the most prevalent. Three degrees of reflection were used to categorize the entries. Slightly over half of the entries achieved high levels of reflection, whereas 49% of the entries did not. Recommendations for teacher educators and facilitators of the professional development of graduate students are provided.