In 2000, Perspectives published an evaluation of Project IMPPACT, a sex education program in New York City that used small groups to help "build communication skills, support healthy adult‐child and peer communications, and attempt to create peer groups in which new behavior patterns become acceptable and desirable." The model also aimed to "enhance young people's ability to adopt or reject new ways of thinking by providing the opportunity to question and apply new information through guided interaction with … people whose opinions matter, such as peers or a respected adult." We asked Lisa Lieberman, the lead author of the evaluation study and a professor of public health at Montclair State University, to share some thoughts on the lessons of the Project IMPPACT evaluation, sex education in the United States today and what goals have yet to be achieved. That interview originally appeared on Perspectives@50, a blog celebrating the journal's 50th‐anniversary year, and will also appear in our December issue.