In this essay Sharon Lamb considers how progressives have begun to win the longstanding battle to shape sex education and what they have had to give up in the process. After framing the battle in historical context, Lamb uses discourse analysis to explore the hidden values in the "evidence-based" (EB) curricula that progressives currently favor and that pass for neutral today. As her analysis reveals, EB curricula privilege three discourses--a discourse of science, a discourse of healthy choices (with an emphasis on individuals), and a discourse of efficacy--all of which are grounded in ideology and serve to legitimize certain kinds of knowledge while undermining other kinds. Lamb concludes by proposing eight tenets for the future of sexuality education, which are intended to displace the eight tenets codified by proponents of abstinence-only-until-marriage sexuality education.