HKDSE Integrated Science Report on the 2019 Examination

Ms Grace Yau

Manager, HKEAA

21 Nov 2019

1

5**

On Question Setting • Integrating different modules

• Balance in coverage of different

compulsory modules 2

• Daily life contexts:

e.g. Q.2 electric wheelchair

Q.7 use of P-32 for

radiotherapy (unfamiliar)

Q.8 GM beancurd

Testing a range of

◦ skills

◦ abilities

• Setting

• Moderating

• Language polishing

• Assessing (by assessors)

• Proofreading

• Printing

3

Processes in Question Paper development

Marking On-screen marking

Markers’ meeting – standardisation of marking

Training scripts, qualifying scripts & control scripts – for monitoring

marking standard

Checkmarking by Chief Examiner

Equating applied to Q.1 to Q.3 in Paper 2 Section B

Panel Paper 1 Paper 2B

1 Qs. 2, 4, 5 & 7 Q.1 [E1]

2 Qs. 6, 8 & 9 Q.2 [E2]

3 Qs. 1 & 3 Q.3 [E3]

4

Moderation of SBA marks SBA marks statistically moderated with both Mean and SD

adjusted

(outlying cases reviewed by the Supervisor)

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Grading • Expert Panel (Chief Examiner, Assistant Examiner, experienced

markers) to determine level boundaries/cut scores by making

reference to

• Level descriptors

• Group Ability Index (GAI)

• Viewing candidate samples

• Endorsement by the Public Examinations Board

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Overview of 2019 Exam

Mean % subject

mark

Mean of Paper 1

(Questions on C1 to C8) ~ 37% 45

Mean of Paper 2

Section A (32 MCQs on C1 to C8; 15%)

Section B (2 out of 3 Qs on E1 to E3; 20%) ~ 33% 35

Mean of SBA ~ 70% 20

Subject Mean ~ 48% 100

Candidature = 81 [ E = 31 ; C = 42 ]

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2019 Award at each Level Year 2012 2013 2014 2015 2016 2017 2018 2019

No. Sat

302 (E=122; C=180)

331 (E=120; C=211)

198 (E=62; C=136)

170 (E=58; C=112)

152 (E=66; C=86)

137 (E=52; C= 85)

106 (E=39 C=67)

73 (E=31 C=42)

Award %

award No.

%

award No.

%

award No.

%

award No.

%

award No.

%

award No.

%

award No. % award No.

5** 0.7 2 0.6 2 0.5 1 0.6 1 1.3 2 1.5 2 0.9 1 1.4 1

5*+ 2.6 8 2.4 8 2.5 5 1.8 3 2.6 4 2.9 4 3.8 4 2.7 2

5+ 7.0 21 6.3 21 6.6 11 4.1 7 7.2 11 7.3 10 9.4 10 6.8 5

4+ 20.9 63 21.1 70 19.2 38 15.9 27 23.0 35 24.8 34 24.5 26 26.0 19

3+ 44.4 134 44.7 148 42.4 84 42.9 73 48.7 74 54.0 74 50.0 53 49.3 36

2+ 71.9 217 73.7 244 72.7 144 72.9 120 80.3 122 85.4 117 77.4 82 82.2 60

1+ 91.7 277 93.1 308 93.4 185 90.6 154 94.1 143 96.4 132 89.6 95 94.5 69

U 8.3 25 6.9 23 6.6 13 9.4 16 5.9 9 3.6 5 10.4 11 5.5 4

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Feedback to teachers • HKDSE Question Papers

1. Question Papers 2. Marking Scheme (with General Marking Guidelines) 3. Reports on Candidates’ Performance

• Briefing Session

• HKDSE School Statistical Report

(a school-specific report showing results statistics of the school and those of all day schools)

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Exemplars and Comments for each Level (E) & (C) Exemplars & Comments: typical performance at each level with brief comments, uploaded to website on 25 Oct 2019

(E) http://www.hkeaa.edu.hk/en/HKDSE/assessment/subject_information/category_a_subjects/int_sci/sp/2019.html

(C) http://www.hkeaa.edu.hk/tc/HKDSE/assessment/subject_information/category_a_subjects/int_sci/sp/2019.html

Candidates’ performance

in Paper 2 Section A

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Paper 2 Section A

% correct > 70 30 – 70 < 30

No. of items 3 27 2

No. of items deleted = 0

Mean = ~50% [16 out of 32 Qs]

Range = 5 – 27

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Easy Difficult

Question No. Key Question

No. Key

1. C (53%) 21. C (38%) 2. B (49%) 22. B (48%) 3. C (84%) 23. D (32%) 4. A (37%) 24. D (53%) 5. A (29%) 25. A (32%) 6. B (63%) 26. A (51%) 7. D (44%) 27. D (41%) 8. B (38%) 28. B (52%) 9. C (67%) 29. A (52%)

10. D (41%) 30. C (66%)

11. D (84%) 31. C (38%) 12. B (74%) 32. A (53%) 13. B (34%)

14. A (15%)

15. D (68%)

16. B (49%)

17. C (51%)

18. A (48%)

19. D (40%)

20. C (68%)

Paper 2 Section A

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Highest % correct

= 84% (Qs 3 & 11)

Lowest % correct

= 15% (Q.14)

* Qs 5, 13 & 14 included

in the Examiner’s Report Qs 8 and 25 : Some weaknesses identified from candidates’ responses

13

Q.5

14

Q.13

Q.14

15

16

Q.8

(38%)

Misconception:

• As the name has suggested, AAS is a steroid (i.e. a lipid), not a protein

(40%) WRONG

17

Q.25

(31%)

(45%) WRONG

Misconception:

• The role of the moderator (慢化劑) is to slow down the neutrons [not the

reactions] so as to sustain the chain reactions in the nuclear fission

Paper 2 Section B Q.1 (E1) Q.2 (E2) Q.3 (E3)

Popularity

E+C 33% 100% 64%

C 55% 97% 40%

E 3% 100% 97%

Mark range 1 - 14 0 - 14 0 - 16

E3 > E2 E2 > E1

Mean mark

difference ~ 0.6 ~ 1.6

% mark difference ~ 3% ~ 8%

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THANK

YOU !

Marker recruitment:

20 Nov-12 Dec 2019

[Markers’ Meeting: 7 April 2019 (tentative)]