The broadest (but unsatisfactory) definition of 'collaborative learning' is that it is a situation inwhich two or more people learn or attempt to learn something together. Each element of this
definition can be interpreted in different ways:
• "two or more" may be interpreted as a pair, a small group (3-5 subjects), a class (20-30 subjects), a community (a few hundreds or thousands of people), a society (several thousands or millions of people)... and all intermediate levels. [1]
Reference:
[1] Pierre Dillenbourg. What do you mean by collaborative learning?. P. Dillenbourg. Collaborative-learning: Cognitive and Computational Approaches., Oxford: Elsevier, pp.1-19,
1999.