Examining Biology Curricular Resources' Scientific Depictions of Evolution, Race, Sexuality, and Identity

Teaching and learning relies on age-appropriate, credible formal (e.g., textbooks, textbook supplements) and informal (e.g., trade-books) curricular texts. Previous research traced American publishers' self-censorship about human evolution within twentieth-century textbooks. This study, informed by the latest scientific understandings, engaged in content analysis of scientific depictions of evolution, race, (homo)sexuality, and intersex identity. The data pool contained American biology textbooks, trade-books, and curricular supplements published after 1990 (n = 153). Findings revealed age-appropriate, comprehensive evolutionary depictions, yet stark omissions of scientific evidence and arguments challenging white supremacy, cisheteronormativity, and pathologization of racialized, queer, and intersex identities. Most modern biology curricular texts, in other words, disregard scientific examination of the tenets grounding racism, homophobia, and transphobia. Why do most biology curricular resources omit the science controverting prominent pseudoscientific fears? Who determines what is taught? The consequences of curricular omissions are particularly alarming considering the violence and violent threats targeting already-marginalized people.