Enacting Instructor Attention in Real Time: Comparing Haptic and Visual Alerts for Low-Disruption Instructor-Facing Classroom Support. - Andrea Barreto Luna; Niloofar Haghighi; Ashal Iman; Vinh Tran-Quang; Arjon Sadikaj; Mark Atta Mensah; Kiemute Oyibo (UMAP Workshops, 2026)