Even though many schools and educational systems, from elementary to tertiary, state that they endorse antihomophobic policies, pedagogies, and programs, there appears to be an absence of education about, and affirmation of, bisexuality, and minimal specific attention to bi-phobia in curriculum, policy, and student welfare. Bisexuality continues to fall into the gap between the binary of heterosexuality and homosexuality across all educational sectors. These absences and erasures leave bisexual students, family members, and educators feeling silenced and invisibilized within school communities. Indeed, these absences and erasures have been considered a major factor in bisexual young people, family members, and educators in school communities experiencing worse mental, emotional, sexual, and social health than their homosexual or heterosexual counterparts. Also of interest is the persistence of bisexual erasure in adult-developed resources and programs, even though there is increasing evidence of sexual identities and practices in youth subcultures that are adopting shifting discursive and societal constructs of sexuality, characterized by notions of fluidity, ambisexuality, and a reluctance to label their sexuality according to the heterosexual/homosexual binary. The articles in this issue profoundly engage with and problematize the three impediments to education systems when those systems engage with sexual diversity instead of sexual duality, namely, erasure, exclusion by inclusion into gay and lesbian categories, and the absence of intersectionality (wherein other facets of identity and experience that interweave with sexuality are not taken into account, such as class, gender, Indigeneity/Aboriginality, ethnicity, geographical location, and religion).