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Sec 1 to Sec 4 · Small groups of 5
Secondary and O-Level Science Tuition Singapore
Secondary science is one subject for two years, then a decision, then two more years of something quite different. Sec 1 and Sec 2 follow the MOE lower-secondary science syllabus as a single combined subject, taught at Arche as its own class. At the end of Sec 2 your child chooses a subject combination, and from Sec 3 science splits into the pure sciences and Combined Science. For Sec 3 and Sec 4 we run O-Level science tuition in Physics, Chemistry, Biology and Combined Science. Every class is capped at five students, in Hougang.
The whole path
How secondary science is structured
Parents are often surprised by how sharply science changes shape partway through secondary school. It is worth understanding the whole path before deciding what your child needs.
Sec 1 and Sec 2: one subject
Science is taught as a single subject covering physics, chemistry and biology together, built around a handful of big themes: diversity, models, interactions and systems, alongside the practices of science itself. There is no split yet, and no national exam in sight.
End of Sec 2: the decision
Schools run a subject options exercise, usually in Term 4 after the year-end results. Your child chooses a subject combination, and that combination determines which sciences they take for the next two years. Places are not unlimited and eligibility depends on Sec 2 results and school criteria, which differ from school to school.
Sec 3 and Sec 4: pure or combined
Science splits into the pure sciences (Physics, Chemistry and Biology, each a full subject in its own right) and Combined Science, which pairs two of the three into a single subject. This is where national-examination preparation begins.
Lower secondary
Sec 1 and Sec 2 science tuition
Lower-secondary science is where a child either learns to think like a scientist or learns to memorise. The difference does not show up in Sec 1 marks. It shows up in Sec 3, when the volume of content triples and memorising stops working.
At Arche, Sec 1 and Sec 2 science is taught as its own class, to the MOE lower-secondary syllabus, and not as early exam preparation. The syllabus is deliberately built around models and systems rather than facts, and each of those is an idea a student either genuinely understands or quietly works around.
Two years later that same student has to choose a subject combination that shapes their options for JC, polytechnic and beyond. A child who has understood lower-secondary science chooses from a position of strength. A child who has been coping chooses from a position of avoidance. That decision is the reason lower secondary matters, and it is the reason we teach it as its own thing.
For what those two years actually contain, see the sixteen topics in the lower secondary science syllabus, and why MOE publishes no official split between Sec 1 and Sec 2. Coming to us from primary school? See PSLE Science tuition.
Sec 1 head-start offer, until 31 December 2026. Starting Sec 1 in 2027? Join our Sec 1 science class by 31 December 2026 and get 10% off the monthly tuition fee for your first two months. Book a trial lesson or WhatsApp us on +65 9678 7010.
The Sec 2 decision
Pure Science or Combined Science: the Sec 2 decision
This is the question we are asked most often, and the honest answer is that it depends on where your child is heading, not on which is “better”.
Physics, Chemistry, Biology
Each taken as a full separate subject, examined at the O-Level in 2026 as syllabuses 6091, 6092 and 6093, and at G3 under the new SEC from 2027 as K323, K324 and K325.
Each has three papers: a one-hour multiple-choice paper, a one-hour-forty-five structured and free-response paper, and a practical examination. More depth, more time on the timetable, and generally the expected route for a student aiming at H2 sciences in JC.
Two sciences, one subject
Two of the three sciences paired into a single subject. All three pairings exist (Physics with Chemistry, Physics with Biology, and Chemistry with Biology), and each has its own syllabus code.
A Combined Science student sits four papers: a shared multiple-choice paper, one structured paper for each of their two sciences, and a practical test covering both. It frees a slot on the timetable for another subject, which is often the real reason a school recommends it.
Neither choice closes off science. Both are respectable, and a student who does well in Combined Science is in a stronger position than one who struggles through Pure. What matters is matching the choice to the child.
One point worth knowing about the new SEC: at G2 level the sciences are offered only as combined pairings. The pure sciences appear at G3. If your child is being banded at G2 for science, Combined Science is the path, and the question becomes which pairing.
Combined Science pairings
Which combination is your child taking?
Arche teaches both the Physics/Chemistry and the Chemistry/Biology combinations.
Physics with Chemistry
Suits students who are comfortable with mathematics and calculation, and it is the more commonly offered pairing across centres.
Chemistry with Biology
Suits students who reason well in words and systems rather than equations, and it is the pairing more often taken by students heading towards the life sciences and health-related courses. Parents in the Hougang area tell us it is the harder one to find locally, and it is the one we are asked for most often.
Physics with Biology
The least common of the three pairings. It exists nationally with its own syllabus code.
Upper secondary
Sec 3 and Sec 4 science tuition
From Sec 3, teaching turns to the national examination. We run classes in each of the three pure sciences and in Combined Science.
Physics
Measurement, Newtonian mechanics, thermal physics, waves, electricity and magnetism, radioactivity.
Chemistry
Matter and its structures and properties, chemical reactions, and chemistry in a sustainable world.
Biology
Cells and the chemistry of life, the human body, living things and ecosystems, and continuity of life.
Combined Science
Both the Physics/Chemistry and Chemistry/Biology pairings.
Students sitting their national examinations from 2027 onwards will take the Singapore-Cambridge Secondary Education Certificate rather than the O-Level, at G1, G2 or G3 subject levels under Full Subject-Based Banding. For the sciences the assessment structure is unchanged (same papers, same durations, same weightings), but the certificate, the subject codes and the banding are new. Read our full explainer on the 2027 SEC and Full Subject-Based Banding.
O-Level science
O-Level science tuition in Hougang
Arche runs O-Level science tuition for Sec 3 and Sec 4 in all four science subjects: Physics, Chemistry, Biology and Combined Science (Physics/Chemistry and Chemistry/Biology). Classes are capped at five students and follow what your child’s school is teaching, at our centre near Kovan MRT.
| Subject | 2026 O-Level | From 2027 (SEC, G3) |
|---|---|---|
| Physics | 6091 | K323 |
| Chemistry | 6092 | K324 |
| Biology | 6093 | K325 |
| Combined Science | Physics/Chemistry and Chemistry/Biology pairings | K326 to K328 (G3), K223 to K225 (G2) |
What O-Level science tuition at Arche covers. Content taught in the order your child’s school teaches it; answer technique for the multiple-choice and structured papers, where marks go on vague explanations and missing units; practical skills for the practical paper; and past-year and school prelim papers in Sec 4.
The O-Level becomes the SEC in 2027. The 2026 Sec 4 cohort is the last to sit the O-Level. From 2027 the national exam is the Singapore-Cambridge Secondary Education Certificate, with the same science papers, durations and weightings. Our O-Level science classes carry straight over.
Result: Shi En, a Sec 4 student with us in 2025, went from C6 to A1 in Combined Science (Chemistry/Biology) at the 2025 O-Levels. Karthiga, Sec 4 in 2026, had failed Physics before and scored an A1 in her 2026 Physics prelims. Book a trial lesson to see how a class runs.
The neglected paper
The practical paper
Both routes are assessed partly by a practical examination, and it is the component students most often neglect.
Pure sciences · Paper 3
The practical examination is worth 20% of each pure science.
Combined Science · Paper 5
A practical test worth 15%, with questions on each of the two sciences.
That is a meaningful slice of the grade decided by whether a student can plan an experiment, record observations properly, and draw a defensible conclusion. Those skills do not improve by re-reading notes.
Year by year
The secondary science roadmap, Sec 1 to Sec 4
Science changes shape twice in secondary school: it splits into separate disciplines in Sec 3, and the national exam changes to the SEC from 2027. Here is what happens each year.
| Year | What is taught | What is decided or examined |
|---|---|---|
| Sec 1 | Lower secondary science: one subject mixing physics, chemistry and biology topics | Subject level (G1, G2 or G3) reviewed at set points under Full Subject-Based Banding |
| Sec 2 | The rest of lower secondary science | Term 4 subject options: Pure or Combined Science, and which pairing |
| Sec 3 | Pure sciences (Physics K323, Chemistry K324, Biology K325) or Combined Science (K326 to K328 at G3, K223 to K225 at G2) | Upper secondary content builds quickly; practical skills start to count |
| Sec 4 | Consolidation, past papers and practical exam preparation | National exam: the SEC from 2027 (the O-Level for the 2026 Sec 4 cohort) |
Pure sciences are offered at G3 only. Our guide to choosing Pure or Combined Science explains the Sec 2 decision in full.
Why Arche
Why parents choose Arche for secondary science
Five students. Not six, not twelve.
Every class is capped at five. In science that cap matters more than in most subjects, because the marks are lost in explanation and in method: a vague answer, a missing unit, a conclusion the data does not support. Those are visible in a class of five and invisible in a class of twenty.
Both Combined Science pairings, taught properly.
Chemistry with Biology is not an afterthought here. It runs as its own class, not folded into a Physics-heavy group.
Aligned to your child’s school.
Schools sequence the science syllabus differently. Lessons follow what your child’s school is actually teaching, so tuition supports the class rather than competing with it.
You can see what happened in the lesson.
Every family gets a private parent dashboard with homework tracking and lesson-by-lesson notes.
Who it’s for
Who this class is for
The student who is memorising
Marks are fine now. They will not be in Sec 3.
The Sec 2 facing the subject options exercise
The decision is made once, in Term 4, and it shapes the next two years.
The Sec 3 who has just met the split
Pure or combined, Sec 3 science is a genuine step up in volume and precision.
The Sec 4 with a target grade
We will be honest with you about what a year can do.
FAQ
Questions parents ask
Do you offer O-Level science tuition?+
Do you teach lower secondary science, or only O-Level?+
What is the difference between Pure Science and Combined Science?+
Which Combined Science combinations do you teach?+
When does my child choose their subject combination?+
Does Combined Science close off JC or the sciences?+
Is there still a practical examination?+
How big are your secondary science classes?+
Can my child join partway through the school year?+
Find us
Where we are
We are in Hougang, three minutes’ walk from Kovan MRT and directly above the McDonald’s at Kovan, within easy reach of Serangoon, Sengkang and Punggol. Students come to us from North Vista, Holy Innocents’ High, Hougang Secondary, Xinmin, Yuying, Peicai, St Gabriel’s and St Andrew’s.
Arche Academy
208 Hougang Street 21, #04-215, Singapore 530208
+65 9678 7010
Classes Tuesday to Friday 3pm to 9pm, Saturday 9am to 5pm.
Sit in on a class
Book a trial lesson
Come and sit in on a class before you decide anything. You will see how your child is taught, meet the tutor, and get an honest assessment of where the gaps are. If your child does not need tuition right now, we will tell you that too.