noun, noun or participle which takes 'suru'
group commuting to school; walking to school in a group
Refers to the practice, common in Japanese elementary schools, of children walking to school together in a group for safety and social training.
この地域では、小学生は集団登校をしています。
In this area, elementary school children go to school in groups.
集団
The group leader for the group commute safely leads everyone to school.