互动封闭仿真课堂
1、智能交互 2、电子板书式视频教学 3、在线互动问答 4、封闭课堂启发式教学方式
随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
听课中的错题能自动加入错题本，课后可方便复习及导出错题本升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒period four
(post-reading and word study)
step 1 revision
have ss talk about different musical styles and their characteristics.
step 2 student-centered vocabulary learning
give ss a few minutes to make a list of words and expressions from the text that they want to learn.
ask ss to show their list to a partner and explain why they chose these words or expressions.
guessing meaning from context.
work together in pairs or in groups, making clear the words and expressions.
use a dictionary.
step 3 consolidation
have ss guess the meaning of the following words in each sentence.
beat 1.my heart is beating faster.(跳动)
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