Communicative desire refers that the classroom activity must create a desire to communicate in the students.
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Given evaluating how communicative classroom activities are, the activity must involve the students in just practicing language for its own sake.
Given communication principle, activities designed for language teaching and learning should be involved real communication and support the learning process.
Cognitivist theory emphasizes the concept of "Zone of Proximal Development" , application of scaffolding method and peers' support in language learning and teaching.
Different from constructivist theory, socio-constructivist theory emphasizes learning is best achieved through the dynamic interaction between the teacher and the learner and between the learners.