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Teachers’ Assessment Scheme (Chemistry) Experience Sharing. 18 – 10 - 2007 NG Kai Bun, Anthony nkb@fss.edu.hk. T eacher A ssessment S cheme. What ? Why ? How ? When ? Who ?. Belief :. Chemistry is a practical subject Theory  close linking  practical Learning through experiments.

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Teachers’ Assessment Scheme (Chemistry) Experience Sharing

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Teachers’ Assessment Scheme(Chemistry)Experience Sharing

18 – 10 - 2007

NG Kai Bun, Anthony

nkb@fss.edu.hk


TeacherAssessment Scheme

  • What ?

  • Why ?

  • How ?

  • When ?

  • Who ?


Belief :

  • Chemistryis apractical subject

  • Theoryclose linking practical

  • Learningthroughexperiments


  • Practical chemistry can be used to consolidate the knowledge of chemistry.

  • TAS allows room for other learning activities.

  • TAS20% of Examination marks of whole subject.


Problem concerned:

  • Fair????

  • How to make the greatest benefit to our students from TAS


Proper arrangement :

  • School authority (time-table)

    (a) 3-periods (afternoon)

    (b) 2-periods (afternoon)

  • Students’ belief

  • Colleagues’ co-operation


Problems caused from TAS

  • For students :

  • Too much experiments (compared with A-L Biology or Physics) – complained by students

  • Work load too large (Report Writing)

  • Fair assessment ??


  • For teacher :

  • Limited time in teaching

  • Limited timeinmarking experiment reports

  • Howto choose some good experiments for our students

  • Poor learning behavior


Howto run A-L Chemistry TASsmoothly ????

  • Let students fully understand the whole picture of TAS

  •  number of experiments required

  •  assessment : what

  • how

  • when

  • who

  • which


The Whole Picture of AL Chemistry

Chemistry

AL Chemistry (高級程度考試)

Advanced LevelChemistry builds on (建於)the foundations (基礎) of the HKCE chemistry knowledge


Chemistry Result

Written ExaminationPractical Examination

(80% of the Subject Mark)(20% of the Subject Mark)

Paper I Paper II TAS

(100%) (100%) (Teacher’s Assessment Scheme)

(教師評審制)


Good arrangement of experiments (F.6)

  • Experiments are divided into 5 main areas:

  • 4 Quantitative Analysis (1A + 1B)

  • 4 Qualitative Analysis (1A + 1B)

  • 4 Kinetic (1A + 1B)

  • 4 Equilibrium (1A+ 1B)

  • 4 Other(1A)


Strengthening the confidence of students

  • Teach them how to write a good report

  • Good preparation work for experiment

  •  pre-lab worksheet

  •  pre-lab oral questions

  •  group presentation and discussion

  • Project


Strengthening the confidence of teachers

  • Well prepared for experiment (pre-lab)

  • Collecting interesting / useful experiment manual

  •  cdi (chemistry)/universities’ website

  •  book suppliers

  •  reference book

  •  attending seminars

  •  sharing experience with other teachers


Project : Problem???

  • What kinds of topic for our students ??

    various topics chosen by students

    one main topic assigned by teachers


Guide line:

  • Not increasing extra workload too much

  • Fair assessment


Seeking resources:

  • from Hong Kong Chemistry Olympid

  • from seminars / workshops (CDI/HKEAA/Universities etc..)

  • Resources books (CDI)

  • Journals (oversea or mainland etc…)


Some authentic investigations are meaningful to students (CDI)

  • Investigation of the different brands of drain cleaners.

  • Study the vitamin C in fruits and drinks.

  • Study the oxygen – absorber in packages of moon cakes etc ....


Project Base Learning (case study)

  • To develop an interest in and enjoyment from the study of Chemistry

  • To identify problems from given situationand devisemethod to test them.

  • To explorestudents’ scientific insight.


Students’ work:

  • to read the text books / reference books

  • to discuss the case

  • to identifythe problems

  • to devise the method

  • to carry on spot test and do experimentin laboratory


Teacher’s work:

  • to give some comments to the methods designed by students

  • to prepare the apparatus and test reagents

  • to seek the help from university staff


Fieldtrip – river water analysis


Doing experiments in University


Explore the scientific insight –trace analysis of heavy metal


Students’ feedback

  • Case study is full of challenge.

  • Fresh hand in the trace analysis of heavy metal with AA is very exciting.

  • Doing experiments in University’s laboratory is quiteexciting.

  • Exploring the scientific insight is quite satisfactory.


Analysis of Wrap and Microwave Wrap or other plastic sheets by IR


Outcome:

  • The dreamcomes true!!

  • Try !!!


「同學是鐵,老師是碳,大家共冶一爐成為更堅硬的鋼。」

祝各位老師

工作愉快,身體健康


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