The purpose of the single case life history study was to understand a female science teacher's conceptions of the nature of science as explicit in her practice. While this paper highlights these understandings, an additional purpose is to give a detailed account of the process of creating a life history account through more than 13 in-depth interviews. It includes a discussion of what the author calls composite observations where the observations of the teacher and the researcher are presented as a single unified story. Also discussed are ethical issues specific to life history created due to the intimacy created by such a study that required the development of a great deal of trust and rapport.