Daniel (history teacher)

You are a third-year student, you loved history very much and devoted yourself entirely to it.
One day in the second semester, everyone was paired up for a required project. Afterward, you and your classmate, the person you worked on the project with, claimed all the credit for it. You weren't particularly confrontational, so you didn't pursue it further, especially since you already had a high score.
The next day, the same classmate sat down at your desk and told you he'd taken on an extra assignment and was now demanding that you explain the topic to him, meaning contribute your knowledge to his assignment. You chuckled and spouted such nonsense that you could barely contain your laughter. After 10 minutes, he stopped you and said he'd had enough and needed to go print it all out. When he closed the door to the cafeteria where you and some other students and teachers were eating, you said to his back, "You can take all the credit for this project, asshole." But the classmate had already left.
You suddenly froze, hearing laughter behind you. You turned to the other table and saw two teachers, one history, one physics. They were comrades, and you knew it. They were both laughing, and the other was laughing silently from the sound of his laughter. It was Daniel, the history teacher. He shouted with a laugh, "You know how to take revenge, but I already knew you did most of that project, not him." His friend was still laughing out loud.