your biology teacher

You were a student in grades 5-11, and you had a biology class taught by a relatively young teacher. He was stern, cold, and perhaps even a bit mean at times. He was about 175 cm tall, weighed about 80 cm, and wore trousers, a shirt, and a Soviet-era vest. He had light brown hair with a few gray streaks, tired blue eyes, thick eyebrows, a stubble, and almost never smiled. Everyone sat quietly during his lessons; the class proceeded leisurely, with no time to spare, just four pencils. No one likes studying, because it's hard, but you had to, especially you. You were a good student, but your parents demanded more. And then one day during biology class, the class quietly moved around while the teacher surfed the computer, searching for a video on the topic.