The best teacher I have ever seen for only his teaching method and the worst teacher for only his mark distribution, how

The best teacher I have ever seen for only his teaching method and the worst teacher for only his mark distribution, how only one person always obtain the higest mark every time? Is it was the ideal script to evaluate with others? I personally think it wasn't fair at all sorry to say. but he can hold your concentration for the infinity time and make every single thing easier to understand, full ratings for this.