When are the 2027 Biology classes?

There are 4 Biology classes a week across Sec 3 & Sec 4, on Sunday and Saturday. See the 2027 timetable above for each level's day and time, and WhatsApp us to check for seats.

How much are the fees?

$320 a month for one subject, $600 a month for 2 subjects, $880 a month for 3 subjects. Each month has 4 lessons per subject.

Is this for the O-Levels or the new SEC?

From 2027, Sec 4 students sit the Singapore-Cambridge Secondary Education Certificate (SEC), which replaces the GCE O-Level. Much of the Biology content carries over from the O-Level syllabus, so well-chosen O-Level past-paper questions are still useful practice. Our lessons follow MOE's latest Biology syllabus, so your child prepares for the exam they will actually sit.

What's the difference between Pure and Combined Biology?

Pure Biology covers the full syllabus in more depth. Combined Science pairs Biology with Chemistry or Physics, and its Biology part covers a selection of the topics. We run separate Pure and Combined Biology classes at both Sec 3 and Sec 4, so your child is taught for the paper they will sit.

Biology has so much content. How should my child revise?

Re-reading notes isn't enough. What works is active recall (testing yourself on key terms and processes) and spaced repetition (revisiting topics over weeks, not cramming), then practising exam questions to learn how answers should be phrased. Our Study DNA program teaches these techniques if your child needs help with how to revise.

Sec 3 & 4 Biology · Pure and Combined

Upper Sec Biology. Pure and Combined. Exam Ready.

Q: Is Biology a good choice in Sec 3?

Biology suits students who are curious about living things and willing to learn precise terms. It leads on to Biology after Sec 4 and to life science and health-related courses later, so check the subject requirements of any courses your child is interested in.

Q: What happens if I am unable to attend a particular lesson?

Students may attend a make-up lesson on other days of the same week if they are unavailable (provided the subject lesson is available). Otherwise, students can access the recording for the class they have missed to catch up on the missed content. Please note that there will not be any refunds or pro-rating of the fees.

Q: What is your class size policy?

Our online classes typically maintain a maximum of 8 students per session to ensure personalized attention. For parents seeking 1-to-1 instruction, we do offer private coaching upon request.

Q: How do I get started?

WhatsApp us or send an enquiry through our contact form. We'll understand your child's needs, recommend a suitable class, and you can start with a free diagnostic assessment.

KLS's Upper Secondary Biology classes follow MOE's latest syllabus for Pure and Combined Biology, from cells and enzymes to the human body, ecosystems and genetics. Students learn to explain each process step by step, in the precise words that exam answers need.

Book a free diagnostic assessment See the 2027 timetable

Levels: Sec 3–4
Classes: 4 a week
From: $320 a month

2027 Biology classes

Sec 3 Biology · Combined Sun 1:00pm – 2:45pm
Sec 3 Biology · Pure Sun 3:00pm – 5:00pm
Sec 4 Biology · Pure Sat 9:00am – 11:00am
Sec 4 Biology · Combined Sat 5:30pm – 7:15pm

Why KLS

Group classes that feel personal

Small classes

Max 8 students, so every student is seen and helped.
Every lesson recorded

Missed a class or revising for a test? Rewatch it anytime.
Notes and worksheets

Materials are included in the fees, so there are no hidden costs.
Parents kept in the loop

Homework and progress updates in a private group chat.

What we cover

The Biology syllabus, topic by topic

Following MOE's latest syllabus for Sec 3 & Sec 4, building up to the SEC national exam (which replaces the O-Level from 2027).

Topic	What your child learns
Cell Structure and Organisation	Plant and animal cells, the parts of a cell and what each does, and how cells are organised into tissues, organs and systems.
Movement of Substances	Diffusion, osmosis and active transport, and how they move substances into and out of cells.
Biological Molecules	Carbohydrates, proteins and fats, the food tests that identify them, and how enzymes work.

Topic	What your child learns
Nutrition in Humans	The digestive system, how food is broken down and absorbed, and the role of the liver.
Transport in Humans	The heart, blood vessels and blood, and how substances are carried around the body.
Respiration in Humans	Aerobic and anaerobic respiration, and how the lungs exchange gases.
Excretion in Humans	How the kidneys filter the blood and remove waste.
Homeostasis, Co-ordination and Response	How the body keeps conditions steady, and how the nervous system, the eye and hormones control responses.
Infectious Diseases in Humans	How diseases spread, how the body defends itself, and the role of vaccines and antibiotics.

Topic	What your child learns
Nutrition and Transport in Flowering Plants	Photosynthesis, leaf structure, and how water and food move through a plant.
Organisms and their Environment	Food chains and webs, energy flow, the carbon cycle, and the effects of people on ecosystems.

Topic	What your child learns
Molecular Genetics	DNA, genes and chromosomes, and how genes control the making of proteins.
Reproduction	Cell division, and sexual and asexual reproduction in plants and humans.
Inheritance	How traits are passed on, genetic diagrams, and variation.

Common mistakes

Where Sec 3 and 4 students lose marks in Biology

Biology is less about calculations and more about precise words. An answer can show the right idea and still lose marks because a key term is missing. These are the mistakes that cost students the most, in both Pure and Combined Biology.

Leaving key terms out of definitions

Osmosis is the net movement of water molecules from a region of higher water potential to a region of lower water potential, through a partially permeable membrane. Drop “net”, “water potential” or “partially permeable” and the marks go with them.
Saying enzymes are “killed”

Enzymes aren't alive, so they can't be killed. At high temperatures they are denatured: the active site changes shape, so the substrate no longer fits and no enzyme–substrate complexes form.
Saying respiration “produces” energy

Energy can't be made. Respiration releases energy from food in every living cell. It's also not the same as breathing, which moves air in and out of the lungs.
Describing when the question says explain

“Describe” a graph means give the trend and quote figures with units. “Explain” means give the biological reason for it. Answering one when the question asks for the other scores little.
Incomplete genetic diagrams

A full genetic diagram shows the parents' phenotypes and genotypes, their gametes, the offspring's genotypes and phenotypes, and the ratio. Skipping the gametes or using letters inconsistently loses marks even when the final ratio is right.
Mixing up xylem and phloem

Xylem carries water and mineral salts up from the roots. Phloem carries sugars made in the leaves to other parts of the plant. Swapping the two is one of the most common slips in plant transport questions.

How we fix them

Your child's free diagnostic assessment shows which of these gaps they have. In class, tutors teach each process step by step and show the key terms that answers need, so your child's answers are precise as well as correct. Pure and Combined Biology are taught in separate classes, and every lesson is recorded for revision.

Parent guide: Pure vs Combined Science: how to choose in Sec 3

Book a free diagnostic assessment

Student results

Real results from students who worked closely with our tutors

Recent test papers from KLS students, from Sec 2 to Sec 4.

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Names, classes and index numbers are blurred to protect our students' privacy.

2027 timetable

Biology class times

Live on Zoom. Pick the day and time that suits your child.

Biology Combined Sunday, 1:00pm – 2:45pm
Biology Pure Sunday, 3:00pm – 5:00pm

Biology Pure Saturday, 9:00am – 11:00am
Biology Combined Saturday, 5:30pm – 7:15pm

Parent–tutor partnership

The attention of private coaching, in every group class

Close collaboration between parents and tutors is usually only found in 1-to-1 coaching. At KLS, every group-class family gets the same attention and partnership.

A private group chat for every student

Your child, you and the tutor, together in one chat. Not a class group: just your family and the tutor.
Weekly homework updates

See what's assigned each week and how your child is progressing, so nothing slips through.
Every milestone, celebrated together

A better test, a tough topic finally clicking, a new personal best. We celebrate it with you.
Open discussion, anytime

Have a concern or question? Raise it directly with the tutor and talk it through.

“They also have a personalized group chat for us together with the tutor, allowing me to track what Jamie is learning and ensure she completes her homework. This partnership has boosted Jamie's morale, and we have cute moments like celebrating her improvements and milestones (getting good grades).”

Lim Li Siok, parent · Google review

KLS26 (S1 Math) · Ryan's Progress KLS Learning Space, Tutor, Parent, Ryan

KLS Learning Space

KLS Student Portal

Lesson recordings, notes and homework

Ryan's homework: not received yet

Lesson

Topic 13: Volume & Surface Area of Prisms (Part 2)
S1 G3 Math · Mon 5:30pm

Homework

Q11, 12, 15, 18 · Due Sunday

Submit it on the student portal: photos or a PDF, straight from the phone. Once it's in, it will be marked and the marked copy sent here.

Examples of messages in a parent group chat. Names and details changed.

Student portal

Everything your child needs, in one place

Every KLS student gets their own portal: lessons, homework and progress, ready on phone or laptop.

Homework due, at a glance

Every assignment with its due date, so nothing is forgotten.
Weekly timetable

All classes and timings in one place, with today highlighted.
Rewards to redeem

Students earn points for their effort and redeem them for rewards.
Each class, all in one

Join Zoom, rewatch recordings, open notes and worksheets, and submit homework from the phone.

Already a student? Log in to the portal

Homework due

Topic 11: Trig Identities (Part 5)Q4, 7c, 8c, 11, 15, 16 Due today
Topic 13: Prisms (Part 2)Q11, 12, 15, 18 Due Sun
Science: Forces PracticeWorksheet A Submitted

My rewards 320 points +20 for this week's homework Redeem rewards

This week

MondayS1 G3 Math5:30 – 7:15pm
Saturday TodayS3 A Math3:30 – 5:30pm
SundayS2 G3 Science11:00am – 1:00pm

Sample screens from the KLS Student Portal. Student details are examples.

Already a student? Log in to the portal

Fees

Simple monthly fees

4 lessons a month per subject. Take more subjects and save.

Upper Secondary

Sec 3 and Sec 4

1 subject $320 a month
2 subjects Save $40 $600 a month
3 subjects Save $80 $880 a month

Book a free diagnostic assessment

Ask about a class

Real results

What KLS parents say

Picked from our Google reviews, word for word.

5.0 ★★★★★ 136 Google reviews

★★★★★

Failing since Sec 1 → A1 in Sec 2

“My son (Sec 2) started 2 lessons before WA1 and managed to get a B4. Before that, he had been failing Math since Sec 1, his foundation was very weak and he had no interest because he couldn’t understand anything. … By WA2, my son improved to an A1. … We’ve tried a few Math tutors over the past couple of years but never found the right one. Desmond is definitely different and is the kind of tutor many parents are looking for.”

tricia Parent · Google review, 2026

★★★★★

E8 → A2 A Math · B4 → A1 E Math

“My child was struggling with AMath and EMath. With Desmond’s support, he improved from E8/B4 to A2/A1 respectively….Desmond truly cares, and his one-on-one sessions were not cheap but they were worth it. Mya and Jiarong also helped a lot with Chemistry and Physics to a B3 from a fail. It wasn’t just about academics…..their guidance really boosted his confidence and mindset too.”

Hr K Parent · Google review, 2025

★★★★★

Failing → A1 in Sec 2 Math

“In Sec 1, my son struggled with the subject, he failed two WAs and only managed a borderline pass in his EOY exam. Since engaging Desmond at the start of Sec 2, we have seen significant improvement. In the recent WA1, my son improved drastically from failing grades to A1. Desmond is patient and able to explain concepts clearly, which has boosted my son’s confidence in Math.”

Ai Shin Ng Parent · Google review, 2026

★★★★★

C → A in Sec 2 Math

“When Ava was in Sec 1, Math was one of the subjects she struggled with, and she finished with a C grade. With the patience, encouragement and guidance from her teacher at Kahu Learning, we gradually saw a real change — not only in her understanding of Math, but also in her confidence. Now in Sec 2, she has achieved an A for Math!”

Angela Goh Parent · Google review, 2026

★★★★★

F9 → A2 in Math

“Desmond is a good tutor. With his help and teaching experience,my daughter, has improved from F9 to A2. It was a big jump bench mark of her results. Luckily, we made the right choice for engaging him as her tutor. A very big thump up to him. His teaching method really works on my girl as she understands better than what the teacher taught in school.”

Eileen Ang Parent · Google review, 2025

★★★★★

D7 → A2 in Sec 1 Science

“Teacher Nimai is a very patient and diligent teacher who never fails to follow up with my son on his homework. He also helped adjusted his own timing to avoid clashing with my son's CCA which I deeply appreciate. Under the guidance of teacher Nimai my son's Sec 1 Science went from D7 to A2 in 6 months. Thank you for all your efforts!”

Lim Ann Parent · Google review, 2026

See more results Read all 136 reviews on Google

Biology questions

Is Biology a good choice in Sec 3?

What happens if I am unable to attend a particular lesson?

What is your class size policy?

How do I get started?

Book a free diagnostic assessment

Tell us your child's level and latest Biology result. We'll reply within a day with a suggested class.

KLS students and their tutor making peace signs at the end of a live Zoom class

Upper Sec Biology. Pure and Combined. Exam Ready.

Group classes that feel personal

Small classes

Every lesson recorded

Notes and worksheets

Parents kept in the loop

The Biology syllabus, topic by topic

Cells and the Chemistry of Life

The Human Body: Maintaining Life

Living Together: Plants, Animals and Ecosystems

Continuity of Life

Where Sec 3 and 4 students lose marks in Biology

Leaving key terms out of definitions

Saying enzymes are “killed”

Saying respiration “produces” energy

Describing when the question says explain

Incomplete genetic diagrams

Mixing up xylem and phloem

How we fix them

Real results from students who worked closely with our tutors

Biology class times

The attention of private coaching, in every group class

A private group chat for every student

Weekly homework updates

Every milestone, celebrated together

Open discussion, anytime

Everything your child needs, in one place

Homework due, at a glance

Weekly timetable

Rewards to redeem

Each class, all in one

Simple monthly fees

What KLS parents say

Biology questions

When are the 2027 Biology classes?

How much are the fees?

Is this for the O-Levels or the new SEC?

What's the difference between Pure and Combined Biology?

Biology has so much content. How should my child revise?

Is Biology a good choice in Sec 3?

What happens if I am unable to attend a particular lesson?

What is your class size policy?

How do I get started?

Book a free diagnostic assessment