In this article, Sandra Wentworth invites science teachers to ask a group of students to write the names of three famous scientists on a piece of paper within one minute. Chances are that most students will mention Einstein and be unable to name another scientist, specifically a woman, except for an occasional Marie Curie response. This article outlines an interdisciplinary unit that exposes fourth- and fifth-grade students to female scientists from several eras and various fields of science.