This study aims to reveal the similarities and differences between the documentational genesis processes of the teachers during their pre-service education in the last year of the education faculty and at the beginning of their professional teaching lives. Reflective investigation research design was used in this study. The data collection tools used during the pre-service and in-service lives are their lesson plans, their diaries, their lesson scenarios, the observations and video recordings of their lessons, the self-evaluation form, and the peer evaluation form. Three main categories were determined for the resources that affect the documentation process of teachers: resources from university education, resources from professional experience, and resources related to their personal learning inferences during their student years.