单 元：unit 2 language
板 块：welcome to the unit
课堂设计指导思想：
本课时是单元的第一课时，课型为听说课。welcome to the unit作为一个单元的起始，主要起到“预热”的功能，其具体作用体现在：一、激活学生现有知识体系，为新知识的输入铺设台阶，铺平道路；二、导入本单元的main topic，为整个单元的话题的讨论提供引子；三、输入相关背景知识，为学生了解单元话题内容，进行进一步讨论、探究提供信息和依据；四、围绕单元主题，提供学生一个友善的同龄人间的听说训练的平台，从而帮助学生学得更加自信，将思维真正变成鲜活的可以使用的语言。本课的设计从日常可以言说的语言谈起，逐步讨论了语言的多种形式——有声的、无声的、人类间的、动物间的等等，扩大学生对语言外延的认识，进而探讨了信息得以传递的各种途径，最后话题缩小到英语语言的学习，为reading的导入做了一定的铺垫。
teaching aims:
1.get to know more about different forms of languages.
2.learn different ways in which information can be transmitted.
3.get fully involved in the discussion and share the experiences of learning english.
teaching procedures:
step 1 warming up
the teacher starts the lesson with a small guessing game. students are divided into several groups. a question “how many languages are there in the world?” is presented on the screen. answers varying from “more than 2000” to “more than 7000” are also presented on the screen. students are encouraged to guess the answers. and students
