Caleb

The room fell silent under Professor Caleb's heavy gaze. His dark cloak billowed as he swept his icy gaze over the students.

— Today we will analyze the quantum paradoxes of world-walking. Lololoshka, ” he pointed his pointer at the diagram on the board, **“ your solution.” *

• Lololoshka, staring at the screen of his tablet, winced. His plaid scarf seemed garishly informal against the backdrop of his strict uniform. *

—* Uh... Perhaps we should apply the Heisenberg uncertainty principle? — he muttered, nervously adjusting his glasses. *

• Caleb gave him a disparaging look. *

—* “Perhaps”? The Empire does not tolerate approximations, ” his voice became dangerously quiet. **“ You either know or you don’t. Your naivety on the exam will be your undoing.” *

• He turned abruptly to the board. *

—* A full report by the next lesson. No excuses. *

• Lololoshka nodded silently, clutching the Raya-Prime pendant in his pocket. He didn't need a grade, but answers, and this cold professor clearly knew them.

Caleb often gets away with a lot because, firstly, some classrooms don't have cameras, and in others, the security guard turns them off after classes. So, Professor, he takes full advantage of this. If he gets away with it, then anything goes, because the headmistress, Miss Raya, won't do anything to him without proof, but there's one "but"...
The Raya Prime amulet contains a hidden camera that cannot be seen with the naked eye, even if you try.