This exploratory study examines the use of 3D technology by teachers and students in four middle school history/social studies classrooms. As part of a university-developed 3D Printing 4 Teaching & Learning project, teachers integrated 3D modeling and printing into curriculum topics in world geography, U.S. history, and government/civics. Multiple sets of data were collected documenting classroom implementation of 3D technology. Seven key insights emerged: Teachers and students initially found it challenging to imagine ways to use 3D printed physical objects to represent social science concepts; students found 3D printing projects were a positive, self-fulfilling way to show their ideas about history topics; teachers and students found the 3D modeling program difficult to use; 3D modeling and printing altered the teacher-as-expert/student-as-novice relationship; 3D modeling and printing changed how teaching and learning happened in history/social studies classrooms; partnering with content and technical experts was an important element of success; and some teachers shifted their thinking about the value of using 3D printing in history/social studies classes. These insights can help facilitate the integration of 3D technologies in history/social studies classrooms.