perusryhmää

Perusryhmä is a Finnish term meaning "basic group" or "core group." In Finnish usage, it denotes a primary, stable grouping of people within a system and is used across different domains to refer to the main cohort under consideration.

In Finnish basic education, perusryhmä commonly refers to the regular class of students with whom teachers work on a daily basis. The composition and size of the group vary by school and grade. The group is typically kept together for a substantial portion of a term or school year, with instruction organized to cover core subjects. The concept may be contrasted with smaller specialized groups or with ad hoc study groups formed for specific tasks.

Outside of education, perusryhmä can describe the baseline or core team in a program, project, or research study. It designates the central set of participants from which expansions or subgroups may be formed, and it is often used in planning, coordination, and evaluation to define the standard cohort.

Etymology: The word combines perus- (base, fundamental) and ryhmä (group), reflecting its role as a foundational or primary grouping in various contexts. The precise usage of perusryhmä can differ by institution or discipline, but the underlying idea remains a stable, core grouping. See also: ryhmä, perusopetus.