Breakdown of На уроке географии я провёл линию линейкой и быстро стёр лишнюю букву ластиком.
Questions & Answers about На уроке географии я провёл линию линейкой и быстро стёр лишнюю букву ластиком.
In Russian, на is the normal preposition for being at/in a lesson, lecture, meeting, concert, class, etc.
So Russian says:
- на уроке = in class / during the lesson
- на лекции = at a lecture
- на концерте = at a concert
Using в уроке would sound wrong here. It is not treated like being physically inside a container; it is treated more like participating in an event.
Because урок changes to the prepositional singular after на when it means location or time context.
- dictionary form: урок
- after на: на уроке
So на уроке literally means in/at the lesson or during the lesson.