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Transcript of 2:00-2:10Registration 2:10-2:30Copyright matters 2:30-2:50Reading and writing tasks in curriculum...
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2:00-2:10 Registration
2:10-2:30 Copyright matters
2:30-2:50 Reading and writing tasks in curriculum planning
2:50-3:30 Comprehension strategies for science reading
3:30-3:40 Break
3:40-4:10 Active reading and writing tasks for students
4:10-4:30 Experience sharing in conducting reading and writingactivities at school
4:30-5:00 Assessment strategies
NSS Learning and Teaching Strategies for Chemistry –NSS Learning and Teaching Strategies for Chemistry –Active Reading and Writing TasksActive Reading and Writing Tasks
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NSS Learning and Teaching NSS Learning and Teaching Strategies for Chemistry –Strategies for Chemistry –
Active Reading and Writing TasksActive Reading and Writing Tasks
4 Jan 20084 Jan 2008
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Gaining and Losing LexovansGaining and Losing LexovansLexovans are either lost or gained in the formation of birgic substances. In dactonic (non-birgic) substances, mergs achieve filled lexovan clives by sharing lexovans rather than by losing or gaining lexovans. Many dactonic substances are composed of mergs of nonrovans that do not readily lose lexovans. As you will see, the sharing of lexovans between two nonrovan mergs allows both mergs to complete their outer clives.
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Gaining and Losing Gaining and Losing LexovansLexovansLexovans are either lost or gained in the formation of birgic substances. In dactonic (non-birgic) substances, mergs achieve filled lexovan clives by sharing lexovans rather than by losing or gaining lexovans. Many dactonic substances are composed of mergs of nonrovans that do not readily lose lexovans. As you will see, the sharing of lexovans between two nonrovan mergs allows both mergs to complete their outer clives.
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Electrons are either lost or gained in the formation of ionic substances. In molecular (non-ionic) substances, atoms achieve filled electron shells by sharing electrons rather than by losing or gaining electrons. Many molecular substances are composed of atoms of non-metals that do not readily lose electrons. As you will see, the sharing of electrons between two non-metallic atoms allows both atoms to complete their outer shells.
Ref: Chemistry in the Community, 4th ed.
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What kind of What kind of science-related science-related articles articles fascinate fascinate students most?students most?
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Themes of reading materials:Themes of reading materials:
STSESTSE nature of sciencenature of science contemporary issue/hot topicscontemporary issue/hot topics historical and interesting storieshistorical and interesting stories extension of chemistry topics learnedextension of chemistry topics learned
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Electrons are either lost or gained in the formation of ionic substances. In molecular (non-ionic) substances, atoms achieve filled electron shells by sharing electrons rather than by losing or gaining electrons. Many molecular substances are composed of atoms of non-metals that do not readily lose electrons. As you will see, the sharing of electrons between two non-metallic atoms allows both atoms to complete their outer shells.
Ref: Chemistry in the Community, 4th ed.
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Comprehension strategiesComprehension strategies
• Graphic organizers: maps, webs, graphs, charts, frames, or clusters…– to help students focus on text structure– to provide students with tools they can
use to examine and visually represent relationships in a text
– to help students write well-organized summaries of a text.
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Types of graphic organizersTypes of graphic organizers
• timeline• fishbone map• compare/contrast matrix• problem-solution-evaluation
diagram• concept map• network tree• cycle
http://www.ncrel.org/sdrs/areas/issues/students/learning/lr1grorg.htm
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KWLH chartKWLH chart
K W L HWhat we know
What we want to find out
What we learned
How can we learn more
after reading the first part after reading the rest
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煉丹術與化學 煉丹術與化學 (( 第一部分第一部分 ))中國的煉丹術有著悠久的歷史,早在戰國時期已有關於方士求 " 不死之藥 " 的記載。 …… 因此,煉丹術實質上是一門偽科學。在東漢著名煉丹家魏伯陽之後,晉代的葛洪是中國歷史上著名的煉丹家。葛洪在綜合前人經驗的同時,親自從事煉丹數十年,積累有豐富的關於物質變化的經驗性知識。 ……
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KWL chartKWL chartK W LWhat we know What we want to
find outWhat we learned(from the article)
煉丹術與金屬及物質的變化有關
煉丹術涉及燃燒
涉及甚麼化學反應 ?
為甚麼是一門偽科學 ?
為甚麼有人因煉丹而死 ?
煉丹涉及很多有毒的化合物,如水銀、氫氰酸
涉及氧化還原反應,如硫化汞的還原
涉及焰色試驗 (Flame test)
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Let’s take a break
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How to make students read actively?
What level of students is the assigned article suitable for?
What topics related to Chemistry / science are associated with the article?
What activities will help students read the article actively? Plan 1 lesson for students regarding the reading of the article.
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Reading or “active” reading?
Answering questionsGenerating questionsExpressing opinionsWriting summarySearching for more information and
presenting the findingsComparing information from different
sourcesWriting reflection
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Active reading involves at least three elements:
A purpose. Specific targets, instructions and goals are given.
A coach. Support, scaffolding, guidance and direction from the teacher are required.
Collaboration. In groups of two or three, two sources of feedback can be obtained: the text itself and other readers.
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Asking for explicit information
Searching for answer to closed question
Inferring / evaluatingMaking judgementsAnswering open-ended q
uestions
Different levels of comprehension
Literal level
Interpretive level
Applied level
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“Newsroom Project” by Queen’s UniversityUse of newspapers in science teaching
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Why use material from newspapers?To relate science to everyday lifeTo provide material directly related to the
curriculum contentTo act as a starter in exploring some ideas
about the nature of scienceTo explore cross-curricular themesTo teach students to read critically and
develop an interest in reading about scienceTo raise awareness and interest in current
issues related to science
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Science News for Kidshttp://www.sciencenewsforkids.org
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Questions about the article:
Before reading In what ways can cars be bad for the
environment? What does “green” technology mean?
During reading What is a fuel cell? How does it work? Why aren’t there a large number of hydrogen-
powered cars on the roads yet?
…
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After reading Do you think that “green” cars will become more
popular in the next few years than they are now? Why or why not?
Compare the advantages of buying a new hybrid car with buying a cheaper used car? What would you recommend?
If hydrogen fuel cells were readily available, what other uses could they have besides powering automobiles?
…
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More activities (Language Arts):
Interview three people who drive to learn how they feel about hybrid or hydrogen-powered cars. What questions would you ask? Take the information you collect and write an article about people’s reaction to “green” cars.
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Which companies make hybrid cars? Make a chart listing hybrid cars now available for sale. For each vehicle, write down its gas mileage (miles per gallon), and its weight and length. Write a paragraph recommending the car that you think is the best one on the list. Explain why.
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Experience Sharing
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Activity 2: How to assess student’s writing
Writing task: With reference to the information sheets, write an
essay for F.5 Chemistry students about the science of rechargeable lithium ion cell in not more than 250 words.
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Discussion:
Which writing is the best? Why?
Design a simple marking scheme for this writing task. List some major criteria for the assessment.
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Organization (6 marks)General guidelines for marking Organization(i) The essay should be clearly ORGANIZED, with suitable DIVISIONS, PARAGRAPHS AND SUB-HEADINGS. These should be clear to the reader.(ii) Terms must be clearly defined.(iii) The essay should be LOGICALLY organized. It must not be a list of facts.(iv) The essay should not contain a lot of irrelevant/superfluous material.
Mark for C.K. Max. for Orgn.
10-876
5-43-21-0
654321
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Presentation (4 marks)This mark is awarded for the ability to present the organized Chemical Knowledge in a suitable, meaningful and readable form.EQUATIONS, DIAGRAMS AND EXAMPLES are looked for.
Mark for C.K.Max. for
presentation
10-76-54-3
< = 2
4321
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Reference marking scheme
2 marks: Reasons choosing Li-ion battery as compared with others
2 marks: Chemical principles including the half-equations
1 mark: Use of Li-ion battery in daily life3 mark: Organization and presentation
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School-based assessment (SBA)
Practical related task Non-practical related task
Basic Chemical Analysis
Experiment Investigative Study
Assignment
Weighting 20% 30% 30% 20%
S5 ≧1 ≧3 1 ≧1
S6