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This paper presents a system, called E-supervisor that detects a student's state of attention and provides appropriate feedback. The system uses an eye detection based method and provides multi-mode feedback such as screen alerting, chair vibration, scent emitting and music playing to make participants aware whenever they are not paying attention. An evaluation shows that supervision by the E-Supervisor can improve learning and attention. Furthermore perceived usefulness is judged high by the evaluation participants, with the vibrant feedback being the preferred feedback modality.