Construction of knowledge is a process that occurs through a lot of social engagement and social interaction. Teachers and learners need to interact with one another so that  learning can take place and new knowledge can be constructed with reference to the past experiences of the learners. All the knowledge that is constructed in the classroom is done with regard to the previous or existing knowledge of learners.
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Learning as Construction of Knowledge and Transmission and Reception of Knowledge

How does Social Mediation Help in The Understanding Process of Knowledge Construction?