This study explored how U.S. middle school students made sense of a variety of topics from world history. I conducted qualitative, task-based, small group interviews with 66 sixth and seventh grade students enrolled in world history courses. Findings indicated that students assimilated new information from world history to their prior knowledge of U.S. history, often mixing content knowledge from U.S. history into their understanding of world history. They also used a narrative theme of progress to structure world history knowledge and (...) centered historical narratives on individuals rather than larger social/political circumstances. Thus, narratives that served as tools in students’ reasoning about U.S. history were found to wield significant influence over their understanding of world history topics. These findings suggest that conceptual changes are necessary for students to develop more complete and nuanced historical understanding. (shrink)