Taken from:

http://www.hci.edu.sg/admissions/high_school/academic-programmes-highschool#assessment-promotion-criteria

Secondary 3 & 4 Assessment Structure
Academic Assessments
Scholastic Assessments
Class/Common Tests
Final Exams
Oral Communications (100%)
Independent Studies (100%)
30%
70%
Oral Participation (Higher Chinese 10% + Best 3 subjects 30%)
40%
Project Work (100%)
Academic MSG [Mean subject grade of all academic subjects except OC & IS]
Current Affairs (Chinese)
30%
Current Affairs (English)
30%
Scholastic MSG [Mean subject grade of all academic subjects, and OC & IS]


Promotion Criteria
Secondary 1 to 4
Level
Academic MSG Criteria
Oral Communications Criteria
Independent Studies Criteria
Sec 1
Academic MSG ≤ 6.00
(Pass in both languages)
C6
C6
Sec 2
Academic MSG ≤ 4.00
(pass in both languages)
C5
B4
Sec 3
Academic MSG ≤ 3.00 (IP)
Academic MSG ≤ 4.00
(Structured IP)
(pass in both languages)
B4
B4
Sec 4
Academic MSG ≤ 3.00
(pass in both languages)
B4
B4
Secondary 4
Level
Criteria
Remark
From Sec 4 to JC1
Eligibility to take expanded curriculum (i.e. 4H2 subjects):
Academic MSG ≤ 2.50
Students who wish to do a particular subject at H2 in college would need to score a minimum grade of B3 in that specific subject (refer to college admission details).


Oral Participation (OP) Marks Computation
Computation of Termly OP Marks (40 marks):
OP Marks of Higher Chinese (10) + OP Marks of best 3 subjects (3X10) = 40
Computation of Final OP Marks:
Final OP Marks = Average of OP marks obtained each term