Transcript Reading and Writing Tasks for Enhancing Students` Learning of

Reading and Writing Tasks for
Enhancing Students’ Learning of
Chemistry
Essay writing activities:
• Identify the advantages and
disadvantages of using synthetic polymers
and metals in the construction industry.
• Compare two types of renewable energy
resources.
• Explain why incineration is not a good
method of disposal of solid waste in HK.
19,600,000 results
General comments and recommendations
for CE Chemistry examination report
• The chemical knowledge required to answer the
question has been acquired by most of the candidates.
However, they failed to present their answers in a
precise and systematic manner.
• 考生答題時的組織及表達能力，均未如理想。考生若能就
探究為本的實驗書寫方案及就化學議題書寫文章等方面多
作練習，可改善有關技能。
The language of Chemistry
- experimental report
• I have conducted an experiment of titrating
dilute hydrochloric acid with dilute sodium
hydroxide this afternoon. At the beginning,
I pipetted 25 cm3 of sodium hydroxide of
unknown concentration into a conical
flask…Finally, after tedious calculation, I
found that the concentration of the sodium
hydroxide solution is 0.10 M.
The language of Chemistry
- experimental report
1.
2.
3.
4.
5.
6.
7.
Title
Objective: e.g. To find …
Principle
Procedures: past tense, passive voice
Results and data analysis
Discussion
Conclusion: relate to objective(s)
The language of Chemistry
• Common text structures (genres) of
science/Chemistry:
– Descriptive report
– Procedural account
– Explanation
– Comparison
– Argument
示例三: 認識可再生能源
Reading & writing activity
- How to write a comparison essay
• Reading an article about different
renewable energy sources
• Discuss and complete a worksheet for
analysing the language features and
structure of the comparison essay
• Write an essay comparing two energy
sources
A planning tool for writing
– Graphic organizers
• A scaffold which provides important clues
about how to organize the writing and the
style of writing required.
Item 1
Item 2
Comparison
Both
Graphic organizer for writing
explanation essay
Cause 1:
Causes
Effects
Result:
Cause 2:
Cause 3:
A frame for supporting the writing of
explanation
Structure
Text
Phenomenon
Identification
Explanation
Sequence 1
Explanation
Sequence 2
Explanation
Sequence 3
Words expressing cause & effect
(example: Because, since, as, as a result, therefore, thus)
Students’ work
• Before learning how to write causal explanation
• After learning how to write causal explanation
http://resources.edb.gov.hk/~science/genre/index-c.html
How to motivate our students?
「科學給人的感覺是非常機械化、抽象化的。要學習
科學知識並不容易，是次課堂的設計，就以新聞片
段及實驗錄影片段來引起學生的學習動機，並多給
同學寫作和表達的機會。」
勞惠昌老師
示例二: 可充式鋰離子電池
《促進化學科學習的閱讀及寫作計畫 – 學習活動示例》(示例二)
家課:
試以教科書作者身份，在250字內介紹可充式鋰離子電池的科學。
More writing tasks about contemporary
issue
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ingredient may be too low in some
household bleaches (15 July 2009)
• 高空擲腐蝕液體傷人事件(2009年5月16日)
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Chemistry Teachers Professional Development and
Resource Sharing Platform
http://edblog.hkedcity.net/nsschem
Thank You!
Sophia Cheng
Tel: 3698 3439
Email: [email protected]