Secondary 2 G3 Science tuition in Punggol should help students explain unfamiliar scientific situations, not merely remember words from a chapter. eduKatePunggol offers small-group tutorials with at most three learners, normally for ninety minutes. In a useful class the tutor can examine every child’s first working, identify the mistaken condition or inference, teach a focused correction and check a different question independently.

The immediate subject is MOE’s G2/G3 Lower Secondary Science course. It connects Scientific Endeavour, Diversity, Models, Interactions and Systems, building science literacy across Chemistry, Biology and Physics foundations. Secondary 2 in 2026 is assessed at school. The first 2027 SEC G3 pure and combined Science papers are later course references and should not be presented as a national examination for today’s Secondary 2 pupil.

An effective group of three does not promise an SEC grade or a particular upper-secondary subject combination. Its educational value comes from individual attention and meaningful peer comparison. One learner may notice a clue in the diagram, another may explain a model and a third may challenge an unsupported conclusion. The tutor must then check that all three can work on unfamiliar tasks without prompts.

What parents need to know

MOE’s Science syllabus is a pathway from Primary Science to upper-secondary subjects, not a single checklist to be completed at an identical speed by every pupil. Schools can arrange their sequences of lower-secondary topics. The parent should provide the current school scheme, the pupil’s first uncorrected responses and recent teacher feedback. An unfamiliar final-year paper can be unnecessarily confusing where its prerequisites are not yet taught.

A test score can hide very different causes. A pupil who names osmosis when glucose moves is making a concept distinction error. A child who understands filtration but chooses it for saltwater has failed to apply material properties to the new context. Another may read a graph’s height as a rate rather than checking the two axes. Diagnosing these first steps helps focus the class and makes the eventual retest meaningful.

Every new practice question should change something important. Rotate the circuit or ray diagram, alter the solute, change which variable was controlled, or ask for a conclusion about a different measurement. The learner should decide which principle applies before the tutor tells them the chapter. Revisit the same idea later to check retention, because a corrected copy of the first problem may reflect temporary memory.

For future orientation, SEAB’s 2027 G3 subject list distinguishes combined Science K326 Physics/Chemistry, K327 Physics/Biology and K328 Chemistry/Biology from separate pure Physics K323, Chemistry K324 and Biology K325. These have different assessment structures and practical requirements. Actual upper-secondary subjects depend on school choices and enrolment; success in current lower-secondary Science is preparation but cannot guarantee a later placement.

Families should also protect school assignments, CCA time, sleep and ordinary curiosity. More practice pages do not automatically create deeper understanding. A well-run private tutorial may eventually make itself less necessary as the pupil learns to check diagrams, use evidence and correct misconceptions independently.

Twelve diagnostic teaching examples: experiments, matter and light

Interpreting an experimental table

First mistake. A student copies the largest measurement and calls it the best result without reading the quantity or unit.

Correct scientific reasoning. First read the headings, measured variables and conditions. A higher temperature may not represent better insulation if the question asks for lower heat loss.

How the small group learns. Three pupils each inspect a different column and then produce a private interpretation of a new dataset.

Independent transfer and limit. The pupil should say what the data actually show before claiming which treatment caused the difference.

Two factors changed in a plant test

First mistake. The learner changes watering and sunlight, yet claims water alone explains taller plants.

Correct scientific reasoning. Independent, dependent and controlled variables matter. With two important conditions changed, a single causal explanation is not established.

How the small group learns. The tutor compares a fair and unfair experiment, then each learner corrects a different new setup.

Independent transfer and limit. An unfamiliar cooling experiment should be checked for comparable starting temperature, volume and surroundings.

Predictions and honest observations

First mistake. The pupil rewrites an unexpected result to match an earlier prediction in a neat table.

Correct scientific reasoning. A prediction is an expectation; an observation is the actual recorded measurement. Disagreement can prompt further inquiry.

How the small group learns. The group reads a fictional experiment with surprising outcomes and each person writes an independent conclusion.

Independent transfer and limit. Do not adjust real data to make a graph or model appear more successful.

Reading instrument resolution

First mistake. The child writes 24.368 mL from a cylinder with only one-millilitre divisions.

Correct scientific reasoning. Precision must match the markings and method of reading. More decimals are not automatically more accurate.

How the small group learns. Each learner reads a different illustrated scale and explains its meaningful unit.

Independent transfer and limit. An unseen thermometer or measuring cylinder should be reported without invented precision.

Graphs with nonzero baselines

First mistake. Two bars appear twice as tall, so the pupil assumes one reading is twice the other, despite a truncated axis.

Correct scientific reasoning. Compare the numbers on the scale rather than visual height; graphical presentation can exaggerate a small difference.

How the small group learns. Each student explains one numeric difference and then interprets a new graph with changed axis divisions.

Independent transfer and limit. A plotted association alone is not proof that one variable caused the other.

A dissolved substance remains present

First mistake. The student says sugar vanished when a mixture became transparent.

Correct scientific reasoning. Dissolving distributes solute in solvent; transparency does not imply a pure solvent or the destruction of matter.

How the small group learns. The tutor asks the pupils to label solute, solvent and solution before new unfamiliar examples.

Independent transfer and limit. A newly described saltwater solution must still be recognised as containing solute.

Filtration cannot recover dissolved salt

First mistake. The pupil predicts that ordinary filter paper will make saltwater pure, because it captures sand.

Correct scientific reasoning. Filtration works for suitable insoluble particles. Dissolved salt is not trapped in the same way, so a different separation process is needed.

How the small group learns. Each pupil evaluates one mixture and chooses a process based on its actual properties.

Independent transfer and limit. Avoid heating solvents in unsupervised tuition; apparatus drawings can teach the relevant method safely.

Chromatography and ink composition

First mistake. A black ink dot is assumed to be one dye because the starting colour looks uniform.

Correct scientific reasoning. A suitable chromatographic separation may reveal more than one component when the substances travel different distances.

How the small group learns. Three students separately identify the origin line, solvent front and spots, then interpret a new chromatogram alone.

Independent transfer and limit. Visible colour before the test is not sufficient evidence of chemical purity.

Element, compound and mixture

First mistake. The child calls oxygen O2 a compound because it has two atoms in its molecule.

Correct scientific reasoning. An element has a single atom type, while a compound has more than one element type chemically combined; a mixture has components not fixed in one chemical compound.

How the small group learns. Each learner classifies a different particle model based on atomic types, not drawing colours.

Independent transfer and limit. A changed H2O diagram is identified as a compound, while oxygen remains an element.

Subscripts in a chemical formula

First mistake. The pupil changes the subscript in H2O to balance a reaction, unwittingly changing the chemical species.

Correct scientific reasoning. Formula subscripts determine composition; coefficients in balanced equations adjust counts while preserving the species.

How the small group learns. The group counts atoms in a simple example, then everybody balances a different suitable equation privately.

Independent transfer and limit. A correct balance must not change a substance into another compound just to fit arithmetic.

Reflection angles and a tilted mirror

First mistake. The learner measures the angle of incidence from the mirror surface instead of the normal.

Correct scientific reasoning. A ray’s incidence and reflection angles are measured from the line perpendicular to the surface, not from a horizontal page edge.

How the small group learns. Each pupil draws the normal in a newly oriented diagram and independently marks the reflected ray.

Independent transfer and limit. A mirror tilted in a fresh question does not change the law of reflection.

Normal incidence at an interface

First mistake. The student assumes a ray must bend visibly every time it enters a different transparent medium.

Correct scientific reasoning. The ray can change speed at an interface, while a normally incident ray can continue without directional bending under the elementary model.

How the small group learns. Three learners compare oblique with normal incidence and then sketch another boundary alone.

Independent transfer and limit. Do not invent numerical refracted angles if the problem supplies no suitable relationship or data.

Eighteen further corrections: cells, energy, forces and systems

The cell wall and cell membrane

Typical misunderstanding. A pupil draws both boundaries as the same structure with identical functions.

Correct model. In a plant cell the wall gives support, while the cell membrane helps control substance movement. Distinguish location and role.

Tutor’s three-person follow-up. Each pupil labels a different boundary or function and interprets another cell picture alone.

Changed transfer task and limit. A rotated diagram should be answered by structural evidence rather than its colour scheme.

A nucleus does not prove a cell is a plant

Typical misunderstanding. The learner identifies every cell with a nucleus as a plant cell.

Correct model. Both familiar animal and plant cells can have nuclei. A plant cell often has a wall and, in suitable cells, chloroplasts.

Tutor’s three-person follow-up. The tutor presents distinct specialised cell diagrams and gathers independent identifications.

Changed transfer task and limit. A new red blood cell should not be labelled as a plant cell because its drawing is green.

Diffusion is a net trend

Typical misunderstanding. The child draws every particle moving only one way, from low to high concentration.

Correct model. Particles move randomly, but the net tendency during diffusion is from higher to lower concentration until distribution becomes more even.

Tutor’s three-person follow-up. Three learners explain initial concentration, motion and later distribution in changed contexts.

Changed transfer task and limit. An unseen perfume-in-air diagram should show diffusion without one-way motion for all particles.

Water osmosis versus solute movement

Typical misunderstanding. The learner labels sugar moving through a membrane osmosis just because a membrane appears.

Correct model. Osmosis specifically concerns net water movement through a partially permeable membrane along a water-potential gradient.

Tutor’s three-person follow-up. Each pupil states the moving species, membrane condition and expected net direction before a new cell question.

Changed transfer task and limit. The word concentrated is incomplete without saying what substance or solution is meant.

Specialised root-hair cells

Typical misunderstanding. The pupil thinks root-hair cells are simply smaller versions of all other cells.

Correct model. A root-hair extension increases surface area relevant to uptake of water and mineral ions; structure is linked to function.

Tutor’s three-person follow-up. Three pupils each explain one feature and then identify a new specialised cell independently.

Changed transfer task and limit. A changed blood-cell image must not be given the root-hair cell’s plant transport role.

Xylem and phloem are different pathways

Typical misunderstanding. The learner calls both tissues water pipes and assigns them identical functions.

Correct model. Xylem chiefly transports water and mineral ions; phloem carries sugars and other assimilates. Match the material to the route.

Tutor’s three-person follow-up. Each pupil follows a different plant transport process and labels a new plant diagram privately.

Changed transfer task and limit. A simplified upward arrow does not capture every detail of real phloem transport.

Food-chain arrows

Typical misunderstanding. The child points energy arrows from bird to insect because the bird eats the insect.

Correct model. The conventional arrow goes from the food organism to the consumer, representing energy transfer.

Tutor’s three-person follow-up. Three learners identify the feeding relation, arrow direction and energy transfer before a new food web.

Changed transfer task and limit. A grass–insect–frog chain must show food to consumer rather than predator to prey.

Predicting ecosystem changes

Typical misunderstanding. The pupil claims that removing a predator must always increase all plant populations.

Correct model. Food webs include indirect relationships. Predictions should be grounded in the given interactions and acknowledge unknown conditions.

Tutor’s three-person follow-up. The group follows different direct and indirect links, and each person reasons through a new web independently.

Changed transfer task and limit. The diagram alone generally cannot yield exact future population numbers.

Opposing forces and direction

Typical misunderstanding. The student adds a 10 N rightward and 6 N leftward force to obtain 16 N rightward.

Correct model. Resultant force accounts for direction. Under this simple collinear example, the net is 4 N rightward.

Tutor’s three-person follow-up. Three pupils draw arrows, combine the signed quantities and check the result separately.

Changed transfer task and limit. An unfamiliar 8 N left and 3 N right case should give 5 N left.

Balanced forces during motion

Typical misunderstanding. The learner insists an already moving trolley must stop immediately when its forces become balanced.

Correct model. Zero resultant force means zero acceleration under the model, so a moving body may continue at constant velocity.

Tutor’s three-person follow-up. Each pupil contrasts rest, steady movement and changing speed before an unfamiliar case.

Changed transfer task and limit. Include friction if the question specifies it rather than assume the environment has none.

Conduction through a solid

Typical misunderstanding. The child says heat travels along a metal bar because the bar itself flows towards the cooler end.

Correct model. Conduction transfers energy through material by microscopic interactions, without the solid moving bodily along the bar.

Tutor’s three-person follow-up. Three learners identify hotter region, cooler region and mechanism before a fresh illustration.

Changed transfer task and limit. Do not improvise dangerous hot-metal experiments outside proper supervision.

Convection with moving liquid

Typical misunderstanding. The pupil labels circulating warm water as conduction simply because it transports heat.

Correct model. Convection involves bulk movement of a fluid carrying thermal energy. Read the movement arrows and medium in the diagram.

Tutor’s three-person follow-up. Each pupil describes a different stage of a water or air circulation model and then handles a changed image.

Changed transfer task and limit. Real heating situations may contain several transfer mechanisms simultaneously.

Radiation does not need air

Typical misunderstanding. The student claims air from the Sun convects through empty space to warm the Earth.

Correct model. Electromagnetic radiation can transfer energy through vacuum; convection requires a material fluid.

Tutor’s three-person follow-up. Three pupils compare conduction, convection and radiation situations before a new space scenario.

Changed transfer task and limit. An everyday warmed surface may subsequently transfer energy by other mechanisms too.

Series electrical path

Typical misunderstanding. The learner thinks the battery must light all drawn bulbs even though one switch opens the only path.

Correct model. A series loop requires a complete conducting path. A gap can prevent normal current throughout the loop.

Tutor’s three-person follow-up. Three pupils trace separately arranged circuits, then independently classify a fresh switch position.

Changed transfer task and limit. An unsafe mains electrical demonstration is never necessary for this explanation.

Parallel branches

Typical misunderstanding. The pupil assumes switching off one branch always stops all other branches.

Correct model. Parallel branches can remain complete separately when the common source and other connections function.

Tutor’s three-person follow-up. Each child examines a branch or common source path, then answers a new diagram independently.

Changed transfer task and limit. A failed common battery connection can still stop every branch, despite the parallel layout.

Digestion is not absorption

Typical misunderstanding. The learner uses nutrient absorption as a synonym for breaking down complex food.

Correct model. Digestion breaks suitable food into absorbable forms; absorption transfers these nutrients across the intestine wall.

Tutor’s three-person follow-up. Each pupil labels a process or organ function in a new body diagram and then works independently.

Changed transfer task and limit. Educational discussion of digestion should not be used to diagnose a child’s symptoms.

Breathing and blood circulation

Typical misunderstanding. The child draws inhaled air moving through the heart as though it were part of the windpipe.

Correct model. Air travels through respiratory passages to the lungs, while blood is circulated by the heart through vessels.

Tutor’s three-person follow-up. Three learners trace airflow, blood flow and the gas-exchange link before a new diagram.

Changed transfer task and limit. Real medical questions require healthcare professionals, not guesses based on school illustrations.

Explaining an environmental graph

Typical misunderstanding. The learner labels a dramatic-looking pollution graph as proof of a specific source with no measured-source evidence.

Correct model. Read what pollutant, date, units and site are actually recorded before proposing a cause. An observed pattern is not source attribution.

Tutor’s three-person follow-up. Each pupil separately identifies the observation, possible explanation and evidence still missing.

Changed transfer task and limit. Do not describe fictional data as live air-quality information.

Six deeper parent decisions

How the five MOE themes connect

Scientific Endeavour, Diversity, Models, Interactions and Systems are connected ways of understanding Science, not five independent boxes. A pupil who reads a scale carefully in a separation experiment can reuse that measurement habit for thermal transfer. Recognising that a coloured cell image is a model supports later interpretation of particles and atoms. A tutor can ask pupils to apply the same reasoning to a different chapter, providing a more meaningful test than memorising the first diagram.

Why Secondary 2 is not a 2027 national exam camp

A Secondary 2 pupil in 2026 has school assessments and normally graduates later than the first 2027 SEC cohort. The present MOE lower-secondary syllabus and school lesson plan should determine how the tutor chooses work. Later G3 pure Chemistry, Physics and Biology papers may be useful as a long-term reference but are not automatic compulsory tests this year. The student should first understand observations, models and evidence before being told that unfamiliar upper-secondary practical papers reveal how capable they are.

The difference between combined and pure G3 Science

SEAB lists three G3 combined Science pairings for 2027—K326 Physics/Chemistry, K327 Physics/Biology and K328 Chemistry/Biology—and three separate pure subjects, K323 Physics, K324 Chemistry and K325 Biology. They have different syllabus coverage and national assessment structures, including practical components. Schools manage offerings and subject selection. A tutor should not claim that the pupil has automatically enrolled in a particular route because of a single Secondary 2 score or because an online worksheet contains that subject’s name.

What a good tutor sees that a score cannot

Two students can have similar wrong answers for very different reasons. One may misread the graph’s axis, while another understands the numbers but makes an inference without controlling another factor. The tutor should examine the original reasoning, teach a distinct correction and give each pupil a changed independent problem. A later response without hints shows whether the idea has become usable. A simple paper total does not reveal that process; a concise individual progress note does.

Why practical learning must remain safe

Scientific inquiry involves controlled variables, meaningful measurement, honest records and safe apparatus use. A private tutor can teach these practices with paper-based diagrams and provided results without pretending that a desk lesson replaces supervised school laboratory experience. Experiments involving mains electricity, unknown chemical substances, heated solvents or unsafe microbial cultures are inappropriate home exercises. A useful class can still teach the pupil to recognise a procedural risk and suggest a more appropriate school-supervised method.

When extra tuition should become less necessary

The goal of tutoring is independent reading of evidence and increasingly accurate explanations. A child may eventually be able to identify a scientific process, apply it in a new problem and check their own reasoning without a teacher’s first hint. At that stage, additional tuition may provide limited value relative to schoolwork, CCAs and rest. Another pupil may need a more private teaching pace than a three-person group offers. An honest provider should discuss reducing or changing support when the evidence supports it.

Ten more unfamiliar Science transfer problems

Chemical change versus physical separation

A student sees the colour of a mixture change after filtration and concludes that new substances were produced. A filter instead separates suitable insoluble components without itself causing a reaction. The tutor should ask which substances are present before and after and what evidence could distinguish a chemical change from a different appearance. Three pupils compare plausible alternatives, then each classifies a new separation scenario independently. A visible difference is not by itself definitive evidence of new chemicals.

Mass conserved when a gas escapes

A child observes a reaction in an open beaker and says matter was destroyed because the measured contents became lighter. Gas may have escaped the measurement boundary. In a suitable closed system, total mass is conserved through a reaction. The tutor can contrast a sealed apparatus and an open container in written diagrams without handling reagents. Each student then explains a changed experiment and specifies which materials are included in the measured system. This shows why the system boundary matters.

A sound wave and a light wave

The pupil claims sound travels through empty space because light from the Sun does. Sound needs a suitable material medium, while electromagnetic light can propagate through vacuum. The tutor can compare a violin string vibrating in air with a satellite communication signal and ask which physical medium is required. The three pupils provide separate explanations, then answer an unfamiliar space-related example privately. A dramatic movie soundtrack is not a scientific demonstration of sound propagation in vacuum.

Wave amplitude versus spacing

A learner labels the distance between adjacent crests as amplitude because both terms appeared together in class. Amplitude describes maximum displacement from equilibrium; wavelength is a spatial repeat distance. The tutor should label an actual axis and show how changing peak height differs from compressing the pattern horizontally. Each pupil then interprets a different wave drawing without the original markings. A static position graph by itself does not always reveal the temporal frequency.

A force can change direction

A student thinks a moving ball experiences a force only when it accelerates in speed, overlooking changes of direction. Velocity includes direction; a net force can turn the path even when the speed remains similar. The tutor can use a safe diagram of a ball being deflected, ask which motion feature changed and compare it with a spring being compressed. Each student completes a changed diagram independently. Do not infer that a single pictured force is the only force in a real situation.

Energy transfer in a torch

The pupil says the energy in a battery disappears as soon as the torch stops lighting. During operation, stored chemical energy is transferred through electrical interactions into light, thermal and other forms. The tutor can ask students to trace each transformation and identify why not all the output is useful illumination. After discussion, every pupil analyses another appliance with different forms of output. Energy conservation and a battery running out of usable stored energy are different statements.

A scientific table with missing controls

The learner copies numbers from a chart and claims one container definitely cools best even though its starting temperature differs from the other. Read column headings and check starting conditions, measured time and amount. The tutor should distinguish the observed final reading from a claim about thermal insulation. Three learners separately identify a data point, a confounder and a fairer method before an unfamiliar retest. Proper interpretation matters more than confidently choosing the largest-looking figure.

Privacy in human reproduction lessons

A pupil assumes a lesson on reproductive anatomy gives permission to question classmates about their bodies or family experiences. Science should use accurate, school-appropriate terminology and diagrams with respectful boundaries. The tutor can ask about named organs and general processes without requiring pupils to disclose personal information. Each learner responds to an anonymous changed academic diagram privately. This reinforces the syllabus while protecting dignity, privacy and the distinction between learning and personal medical advice.

A microscope picture and actual size

A learner measures a printed cell as 40 mm and says that is its actual size, forgetting the image was magnified. Magnification compares image size with actual size using consistent units. If a 20-mm image represents an object 0.1 mm across, its magnification is 200 times. The tutor checks which measurement belongs to the image and which to the object. Each pupil then works a different labelled micrograph independently. Without a scale or magnification, the printed size is not enough to infer actual size.

An answer with the wrong question command

The pupil writes ‘the lamp is off’ when asked to explain why it is off. That is an observation, not the required mechanism. The tutor should identify the instruction—state, describe, explain, suggest or evaluate—and ask what evidence a complete response needs. A suitable explanation might refer to an open switch breaking the conducting path when the diagram supports it. Every pupil then answers a changed command about another system independently. A longer answer does not help if it responds to a different question.

Two illustrative small-group Science lessons

In one hypothetical Secondary 2 G3 class, a learner describes filtered saltwater as pure because it is transparent. The tutor asks what a paper filter retains, explains why dissolved components can pass with the liquid and contrasts this with filtering insoluble sand. Each of the three pupils first writes a separate explanation, then discusses the conditions that change the correct method. The original child later evaluates a fresh sugar-solution example alone. This illustrates a teaching process rather than a claim about real student results.

In a second illustrative class, a pupil uses a plant-growth graph to assert that watering caused a difference, though the two groups received different amounts of light. The tutor separates the observed growth difference from the unsupported causal claim and asks what a controlled study would require. Each member evaluates a new unfamiliar investigation without copying the teacher’s concluding sentence. The educational outcome is reasoning grounded in evidence, not memorising the phrase fair test.

A useful ninety-minute tutorial

An illustrative session begins with ten minutes retrieving an earlier corrected concept, followed by fifteen minutes reviewing original schoolwork. Twenty minutes might be used for one focused contrast, twenty more for individual responses and personal feedback, and fifteen for an unfamiliar transfer task. The final ten minutes are for checking, an error record and a manageable next practice goal. The times should change with the pupils’ actual needs rather than be treated as a fixed formula for teaching.

An eight-week review

Weeks one and two can establish a baseline from current school experiments, diagrams and explanations. Weeks three and four target recurring errors using contrasting examples and new private questions. Weeks five and six connect the same principle to another MOE Science theme. Weeks seven and eight revisit earlier misconceptions after a delay and decide whether the pupil can now recognise the method unaided. This is a flexible review sequence, not a promise of a national grade change.

Frequently asked questions

Which syllabus applies in Secondary 2 G3 Science?

MOE’s G2/G3 Lower Secondary Science syllabus, organised into Scientific Endeavour, Diversity, Models, Interactions and Systems.

Does Secondary 2 have an SEC paper in 2026?

No. The pupil is assessed by the school. The SEC applies to the appropriate graduating cohort.

What combined G3 Science subjects exist?

For 2027, SEAB lists K326 Physics/Chemistry, K327 Physics/Biology and K328 Chemistry/Biology.

Are pure G3 Physics and combined G3 Science the same?

No. Pure Physics K323, Chemistry K324 and Biology K325 are separate entries with different syllabus and exam structures.

Should students practise final-year papers immediately?

Not automatically. The current school syllabus and missing prerequisites should determine the next task.

How can three students benefit?

The tutor can examine separate first attempts and offer personal corrections, provided each learner solves a new unfamiliar task alone.

Does a small class guarantee marks?

No. Class matching, feedback and the child’s independent performance matter, and no grade can be promised.

Can tuition replace a school laboratory?

No. Supervised school practical learning remains important; private lessons can help with safe diagrams, data and reasoning.

Official references and connected Punggol guides

MOE Lower Secondary Science syllabus · SEAB 2027 G3 subjects · Secondary 1 G3 Science guide · Science tuition enquiry.

Editorial check dated 6 November 2026. National codes cited refer to the published 2027 cohort, not this child’s Secondary 2 examination or a guaranteed future enrolment. MOE and SEAB do not endorse the private tutor.

More G3 Science small-group tutor guides in Punggol

Secondary 3 G3 Science Small Groups Tutor in Punggol | Effective Class Size Tutorials · Secondary 4 G3 Science Small Groups Tutor in Punggol | Effective Class Size Tutorials · Secondary 3 G3 Combined Science Small Groups Tutor in Punggol | Effective Class Size Tutorials