We conducted experimental classes in an elementary school to examine how the advantages of stereoscopic 3D images could be utilized in education. More specifically, we selected a unit of the Tumulus period in Japan for sixth-graders as the source of our educational 3D materials. This unit represents part of the coursework for the topic of Japanese history. Educational materials used in our study included stereoscopic 3D images for studying the stone chambers and Haniwa (i.e., terracotta clay figures) of the Tumulus period. Results from our first experimental class showed that educational 3D material helped students focus on specific details and also understand three-dimensional spaces and concavo–convex shapes. Our second experimental class revealed that educational 3D materials also led students to come up with novel questions. These studies suggest the need to understand how to use the essential aspects of stereoscopic 3D images for developing new models in education.