The introductory chapter outlines the key themes and issues that will be explored throughout the book. It sets out the rationale for conducting the research presented in the book and presents the research questions that will be addressed throughout the rest of the book. The chapter includes some short data extracts from interviews with educators and LGBT+-identified young people in which they discuss their experiences of school. These data extracts introduce the key themes and issues to be explored throughout the book and support its rationale. The introduction also includes brief information about the social, political and legal contexts for the themes explored throughout the book, although more detailed contextual information will be provided in Chapter 2. I introduce the book’s main research questions and provide a critical discussion of the gender- and sexuality-related terminology used throughout the volume. Information about the research sites is included. Finally, the introduction provides a short overview of the structure and content of the rest of the book.