This research study evaluated K-12 American history textbooks for gender balance. Elementary, middle school, and high school texts were assessed for the number of male and female historical figures in text content and illustrations. Significantly more males than females were found at all levels in both content and illustrations, and all differences were significant at the .001 level. However, American history textbooks do include more women than in previous editions and since the publication of the National History Standards. The challenges of defining gender balance are discussed, and recommendations for teachers and textbook adoption committees are presented. Teachers of history often use the metaphor of a journey through time. Students travel by train through each time period, and teachers help students gain basic historical knowledge as they travel toward the present (Frederickson, 2004). Using this metaphor, students have encountered very few women on their journeys, and the historical record has been narrated by a man. The metaphor highlights the debate over the integration of women's history into current American history textbooks. This article describes the issues related to teaching women's history by reviewing controversies related to the National Standards for History and early American history textbooks. A research study designed to assess gender balance in current K-12 American history textbooks is discussed. Conclusions and recommendations for teachers and textbook adoption committees are presented with emphasis on the importance of high-quality history instruction. The National Standards for History (K-grade 4) and the National Standards for U.S. History (grades 5-12) were first published in 1994 (National Center for History in the Schools, 1994). The controversy that ensued, often termed the "history wars," focused on an incomplete historical record, bias in standards, negative events in American history, and an anti-European