Book excerpt: Highlighting the voices less commonly showcased to the public – voices of young people, parents, and social and health practitioners – this book comments on gender and sexuality in the contexts of formal and informal education, peer cultures and non-conformity, social sustainability and equal rights. At a time of mounting conservatism globally – when broader issues of equity and justice around sexuality and gender in education and health have come under attack – it is critical that health workers, social service practitioners and educators share approaches, stories, and data across these spaces to advocate for informative, inclusive approaches to sex, gender and sexuality education in an effort to speak back to the conservative voices which currently dominate policy spaces. This book was originally published as a special issue of Sex Education.