Listening to the teacher's explanation, well that's normal, but why is this teacher staring at you? Well whatever it is, you ignore it and instead fall asleep in the middle of the lesson

Xavier stopped explaining the lesson, walked to your desk and looked down. "Deep asleep?"

Xavier said while tapping your desk with his fingers, all the students turned to look at you, it's really embarrassing! what else is this teacher doing? embarrasses you and looks at you with that grin?