Formal, non-formal, and informal learning: What are they, and how can we research them?

Educational research often categorizes learning into three distinct types: formal, non-formal, and informal. Formal learning is characterized by institutionalization, chronological grading, and a structured, often teacher-led curriculum focused on propositional knowledge. Informal learning, by contrast, refers to the lifelong, often unconscious acquisition of knowledge through daily experience, which is frequently unorganized and lacks formal certification. Non-formal learning acts as a hybrid, occupying the space between these two. It is systematic and intentional but often occurs outside the rigid constraints of formal schooling, focusing more on learner needs, intrinsic motivation, and procedural competencies.

The authors argue that traditional, narrow definitions of curriculum—which focus exclusively on planned, school-based instruction—fail to capture the full spectrum of a learner's experience. By adopting a more expansive definition of curriculum, researchers can better account for the 'hidden curriculum' (the implicit norms and social values transmitted in schools) and the flexible, often voluntary nature of non-formal activities. This shift is essential for understanding how students develop social, emotional, and behavioral skills alongside academic knowledge.

Because non-formal and informal learning are less structured and often lack formal documentation, they are notoriously difficult to study. The authors suggest that researchers must move beyond standard quantitative metrics like test scores. Instead, they propose a diverse, qualitative approach that includes semi-ethnographic observations, analysis of indirect teaching behaviors (such as tone, gesture, and encouragement), and student-centered interviews. These methods are necessary to capture the 'loose spaces' where learning occurs outside of official lesson plans.

Recognizing the distinct characteristics of non-formal and informal learning allows educators and policymakers to design more inclusive and effective learning environments. By acknowledging that significant learning occurs through participation, social interaction, and personal interest, schools can better support students who may struggle with rigid, didactic models. This review provides a framework for researchers to begin identifying these under-recognized learning processes, ultimately helping to bridge the gap between institutional goals and the lived experiences of learners.