This study explores the ways in which master thesis writers position their research in the field of English language teaching in a context where academic literacies are still a developing field. From a social semiotic perspective, this paper aims to identify the resources writers use to represent their object of study and provide a context and justification for research. The analysis focuses on the ideational and textual metafunctions to account for patterns of meanings in seven introductory chapters of master theses in English teacher education. The results reveal a set of interconnected genres--descriptions of the object of study, definitions, and personal exemplum--that build a shared experience with the reader as well as the persuasive purpose of the text.