This is the 9510th most frequent German word.
mitschüler
"Classmate."
Here, 'Mitschüler' is used to refer to a fellow student in the same educational setting.
Mein Mitschüler hat mir geholfen, das Matheproblem zu lösen.
My classmate helped me solve the math problem.
In this sentence, 'Mitschüler' refers collectively to the peers within the narrator's group.
Die Mitschüler in meiner Gruppe waren sehr freundlich.
The classmates in my group were very friendly.
Here, 'Mitschüler' is used in a role-based manner, addressing the individual responsibilities of a fellow student.