Constructivism is a theory of teaching, the basic idea of constructivism is:
“Knowledge cannot be instructed by a teacher, it can only be constructed by a learner”.
This means learning is not just a direct result of listening to a teacher. The students have to organize and develop what they hear and read.
Constructivisim is an example of Cognitivism applied to teaching.
The opposite approach to constructivism is Instructivism.