Hybrid classrooms, where remote and on-site students attend lectures together, often rely on video-conferencing platforms as the primary communication tool. However, these platforms typically limit remote students to a fixed view, preventing them from gaining a holistic perception of the physical classroom. Additionally, remote students’ presence is often overlooked in interactions between the teacher and on-site students, potentially leading to disengagement. To address these challenges, we propose MRClassroom, a mixed-reality (MR) system designed to enhance remote students’ presence by spatially integrating their representation into the physical classroom. MRClassroomfeatures a dynamically constructed 3D replica of the classroom, providing remote students with a sense of co-location with their on-site peers. Using an MR headset, teachers can interact with remote students as naturally as with those on-site, while maintaining the instructional flow. Preliminary studies suggest the system improves student engagement and classroom dynamics.