问题：

Second language acquisition and teaching research

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答案：

The model of language classroom should generally include five steps, which is warm-up, lead-in, presentation, practice, production and summary.At the warm up stage, the teacher arranges some activities related to the learning items to build English learning atmosphere. The main purpose is to arouse students’ motivation. At the presentation stage, the teacher introduces new vocabulary and grammatical structures in whatever ways appropriate. At the practice stage, the lesson moves from controlled practice to guided practice and exploitation of the texts when necessary. At the production stage the students are encouraged to use what they have learned and practiced to perform communicative tasks. At the summary stage, the teacher and students work together to summarize what they have learned in class.