This is the 13305th most frequent Korean word.
등교도
The Korean word "등교도" does not exist or appears to be non-standard/incorrect.
Here, '등교도' is used to emphasize the action of attending school as part of a sequence of actions.
학생들은 학교로 등교도 하고 집으로 돌아가기도 합니다.
Students go to school and also return home.
In this sentence, '등교도' is highlighting the activity of going to school in the context of punctuality.
등교도 하는 시간이 늦으면 지각으로 처리됩니다.
If the attending school time is late, it will be considered tardiness.
The word '등교도' indicates one of the alternatives available in a flexible scenario.