Stevens scowls and shakes his head, stuffs his hands in his pockets, and mutters something under his breath about the “catastrophe of modernism” before turning toward the chalkboard. He digs a piece of yellow chalk from his bag and scrawls on the board: WRITE WHAT YOU KNOW.
This is once again a quote proving how uninteractive and dull of a teacher Professor Stevens is being. He is purposely putting down an answer to a question that he had most likely unwillingly asked. He seems to be ticked off due to amazing sensory words like "scrawls" and "scowls" as he was answered with the opposite tone that he had given.