small group
Refers to a group of a limited number of people, often contrasted with larger organizations or masses. Common in educational, social, and organizational contexts.
I like activities in small groups.
This class split into small groups and discussed.
グループ is a more general and common word for 'group', while 小集団 specifically emphasizes the small size.
Compound of 小 (small) and 集団 (group).