Learning about Language教学评价实录

教学设计简案

WHO AM I? 武汉市新洲区第二中学

余永畅

Introduction

In this period, after the warming up, students will first be guided to understand how computer works. Then they will be helped to read a narration about computer and its development. Three examples of “Warming

up” designs are presented for the teachers’ reference. Computer and overhead projector may be used to aid the teaching and learning.

Objectives ■

To help students learn to make decisions and to reason in English ■

To help students learn to read an introduction about computer

■

To help students better understand “the computer science”

■

To help students learn to use some important words and expressions ■

To help students identify examples of “the present perfect passive voice” in the text

Focus Words Expressions

Patterns

solve, explore, arise

from…on, as a result, in a way, with the help of, deal with, watch over Over time I have been changed quite a lot. As a result I have totally changed my shape. I am now truly filled with happiness that I am a devoted friend and helper of the human race!.

Aids Multimedia facilities, tape-recorder, photos, diagrams

Procedures 1. Warming up

2. Pre-reading by talking about how computer works

3. Listening and reading to the recording of the text WHO AM I? 4. Reading aloud and underlining expressions

5. Reading and transferring Scan the text for information to complete the flow chart below, describing the development of computer. a calculating machine in 1642 in France →

an Analytical Machine in 1822 →

a “universal

machine”

in 1936 →

the size of a large room →

made smaller and smaller →

getting new transistors in 1960s→ clever and quicker → a network in the early 1960s →

talking to humans using BASIC in the early 1960s → brought into people’s homes in 1970s → Internet

6. Reading to get the general idea of the

Type of writing and summary of WHO AM I? Type of writing Main idea of the passage Topic sentence of 1st paragraph Topic sentence of This is a piece of narrative writing. It tells about the birth and development of computer. I began as a calculating machine in 1642 in France.

2nd

Since the 1970s, my memory improved. paragraph

Topic paragraph 7.Discussion

sentence of 3rd

Since the 1970s many new applications have been found for me.

How computers have

changed our lives? 8. Homework Fill in the blank with one word to complete the summary of the text. In order to understand how a computer really 1 _____ , we first have to examine what it really means for a system or device to be "digital". All being digital 2 _____ is that a system stores and operates on information in a very specific 3 _____. In a digital system, every piece of information is stored in a bit (or multiple collections of bits). A bit is a variable 4 _____ can have only one of two values: it can either be a 1, or be a 0. The easiest 5 _____ to think of a bit is as a container - this container is either completely 6 _____ or completely empty, but never anything in between. A full container can be thought of as a 1, 7 _____ empty container as a 0.

The beauty of this is that any piece 8 _____ information can be represented as a collection of bits. The way this is done is by making each bit the 9 _____ to a yes or no question. For example,

lets say I wanted to know whether a person has long hair 10 _____ not. I could represent this piece of information by deciding that if the 11 _____ has long hair, I will set a certain bit to be a 1. If the person doesn't have long hair, I will 12 _____ that same bit to be a 0. As long as you followed the same convention, you could look at the 13 _____ bit that I just set and know whether the person has long hair or not, even if you had 14 _____ seen them before. (Keys: 1 works 2 means 3 way 4 that 5 way 6 full 7 an 8 of 9 answer 10 or 11 person 12 set 13same 14 never)