Biology & Combined Science (Biology)Report on 2020 Exam Ben Tsui Manager (Biology), HKEAA Overview...
Transcript of Biology & Combined Science (Biology)Report on 2020 Exam Ben Tsui Manager (Biology), HKEAA Overview...
-
Biology & Combined Science (Biology)
Report on 2020 ExamBen Tsui
Manager (Biology), HKEAA
-
Overview of Exam StatisticsPaper Biology CS(Bio)
1A (MC)Mean : 22.4 out of 36
(i.e. 62.2%)Mean : 10.3 out of 24
(i.e. 43.0%)
1 51.5% 32.1%
2 51.7% N.A.
SBA 72.8% 62.9%
Subject 55.8% (S.D. 16.3%) 41.4% (S.D. 15.1%)
Candidature 12826 239
-
ResultsBiology
Level 5** 5*+ 5+ 4+ 3+ 2+ 1+
Percentage 1.8% 7.4% 18.7% 45.3% 71.4% 89.7% 97.2%
Combined Science (Biology)
Level 5** 5*+ 5+ 4+ 3+ 2+ 1+
Percentage 0.43% 1.3% 2.6% 16.7% 38.2% 69.1% 86.3%
-
Number of candidates at top levels (Bio)
Level 2017 2018 2019 2020
DSE 5** 273 (1.9%) 236 (1.7%) 254 (1.9%) 231 (1.8%)
DSE 5* 1074 (7.5%) 992 (7.0%) 1056 (7.9%) 975 (7.6%)
DSE 52717
(18.9%)2496
(17.6%)2632
(19.7%)2449
(19.1%)
Candidature 14864 14148 13361 12824Subject mean 54 55.3 49.8 55.8
-
Performance in MC items(relative to this cohort)
Biology
% of cand. correct >70% 50%-70% 70% 50%-70%
-
Performance in conventional questions(relative to this cohort)
Biology
% mark >60% 40%-60% 60% 40%-60%
-
• Mark equating was applied to the 4 questions in Paper 2
• After equating:
Elective Popularity Mean % mark
Human Physiology 94% 52.8%
Applied Ecology 59% 47.4%
Microorganisms & Humans 14% 38.1%
Biotechnology 39% 59.1%
Mean marks for Paper 2
-
Distribution of questions in Paper 1Curriculum topics Suggested teaching time (%)
(Out of 180 hours*)% of mark
Section 1 24 19
Section 2 21 16
Section 3 47 57
Section 4 8 8
* 20 hours is allocated for Scientific Investigations
-
Question types in 1B
• Structure and functions (Q.1,4,10,11)
• SI and practical skills related (Q.5,8)
• Data interpretation (Q.7,8,9)
• Scenario-based (Q.2,3,6,7,8,9)
-
MC items
-
9 %
A 12 Did not know lipase is secreted from pancreas
B 21 Did not know insulin is a peptide hormone
C 22 Did not know amylase is secreted from pancreas
D 45 -
ER, i.e. synthesise protein secretions from pancreas
-
14 %
A 31 Hydrostatic pressure
B 53 -
C 5 Osmosis
D 11 Osmosis
-
20 %
A 34 -
B 14 Did not know clearly the relationship between DNA and chromosomes; wrongly thought that chromosomes shared equal amount of DNA
C 20 Did not know the daughter cells from mitosis are in diploid state
D 32 Did not know clearly the relationship between chromosome and chromatids; wrongly thought that the chromosome becomes two chromosomes instead of sister chromatids after DNA duplication
-
Ruled out the possibility of the affected gene being recessive, either autosomal or X-linked
35 %
A 37
B 24
C 20
D 18
36 %
A 8
B 27
C 41
D 25
-
Feedback to Teachers• HKDSE Question Papers
– Question papers
– Marking Scheme (with General Marking Guidelines)
– Reports on Candidates’ Performance
• Samples of Candidates’ Performance and Comments for each level – http://www.hkeaa.edu.hk/en/HKDSE/assessment/subject_information/category_
a_subjects/bio/sp/2020.html (English version)
– http://www.hkeaa.edu.hk/tc/HKDSE/assessment/subject_information/category_a_subjects/bio/sp/2020.html (Chinese version)
• Briefing Sessions
• HKDSE School Statistical Report(a school-specific report showing statistics of the school and those of all day schools)
https://www.hkeaa.edu.hk/en/HKDSE/assessment/subject_information/category_a_subjects/bio/sp/2020.htmlhttps://www.hkeaa.edu.hk/tc/HKDSE/assessment/subject_information/category_a_subjects/bio/sp/2020.html