Abstract: Physical reactions of students may be monitored during a first training lesson, and the physical reactions may be used to determine the depth of learning, whether and when a second training lesson should be presented to the students. The type and/or timing of the second training lesson can be based on biometric scores obtained based on student physical reactions such as facial expressions, Galvanic skin response, and heart rate variability. The biometric scores may be used to modify test scores associated with the students and the first training lesson, in order to determine the type and/or timing of the second training lesson.