Issues related to gender and sexual diversity in schools can generate a lot of controversy, with many educators and youth advocates under-prepared to address these topics in their school communities. This text offers an easy-to-read introduction to the subject, providing readers with definitions and research evidence, as well as the historical context for understanding the roots of bias in schools related to sex, gender, and sexuality. Additionally, the book offers tangible resources and advice on how to create more equitable learning environments. Topics such as working with same-sex parented families in elementary schools; integrating gender and sexual diversity topics into the curriculum; addressing homophobic bullying and sexual harassment; advising gay-straight alliances; and supporting a transgender or gender non-conforming student are addressed. The suggestions offered by this book are based on recent research evidence and legal decisions to help educators handle the various situations professionally and from an ethical and legally defensible perspective.