Bukit Timah parents choosing Cambridge IGCSE Physics tuition should confirm syllabus 0625, the examination year, the Core or Extended entry and the practical-assessment option. The 2026–2028 syllabus includes space physics as well as mechanics, thermal physics, waves, electricity, magnetism and nuclear physics. Good preparation connects diagrams, physical explanations, calculations and experimental evidence; learning a formula list alone will not teach a student when each relationship applies.

A three-student tutorial can help when each learner has time to predict an outcome, justify a method and complete a fresh question independently. Bring recent marked work and the school’s component information to a first consultation. This guide explains how to evaluate suitable support, not whether a particular class, laboratory, tutor or timetable is available. Confirm those arrangements, fees and any practical provision directly before enrolling.

• Qualification: Cambridge IGCSE Physics 0625, separate from Singapore’s SEC.
• Examination-year focus: 2026–2028.
• Core route: Papers 1 and 3, with grades C–G available.
• Extended route: Papers 2 and 4, with grades A*–G available.
• Practical assessment: either Paper 5 Practical Test or Paper 6 Alternative to Practical.
• Learning priorities: model the situation, select a relationship, use consistent units, interpret the answer and evaluate evidence.

The assessment route and why it changes preparation

In the checked 2026–2028 arrangements, multiple choice contributes 30%, theory 50% and practical assessment 20%. The multiple-choice paper lasts 45 minutes and the theory paper 1 hour 15 minutes. Core candidates take Papers 1 and 3; Extended candidates take Papers 2 and 4. Both routes also require Paper 5, lasting 1 hour 15 minutes, or Paper 6, lasting one hour. The official 0625 syllabus specifies the complete content and assessment requirements.

Alternative to Practical changes the form of assessment, not the need to understand investigations. Students must still reason about measurements, controls, graphs, uncertainties and improvements. A tutor should explain what can be taught through diagrams and data and what practical experience the school supplies. A classroom should not be described as a laboratory unless the facilities and supervision actually exist.

This guide was checked on 15 November 2026. Use the Cambridge Physics subject page for later updates and the correct examination-year document. The examples below are original teaching illustrations, not predicted examination questions. For Singapore’s different national qualification, consult SEAB’s SEC information.

Diagnose the decision before the calculation

A student can be competent at algebra and still struggle with Physics because the first difficulty is choosing the model. Does the question concern a resultant force, energy transfer, pressure or a rate of change? The numbers do not select the formula by themselves. A useful diagnostic asks the learner to describe the situation and identify the quantity being sought before calculating.

Give a small set containing a motion graph, a force diagram, a circuit and a practical dataset. Observe whether the student reads axes, identifies directions and checks units. Ask for an estimate where appropriate. A correct numerical result obtained after the tutor names the formula is supported performance; it should not be confused with independent method selection.

Then remove time pressure from a wrong answer. If the learner still cannot explain why the forces balance, the problem is conceptual rather than simply speed. If the physical explanation is sound but a conversion fails, the repair is different. If a diagram is misunderstood, more calculation practice may leave the underlying issue untouched.

A helpful parent report identifies a specific obstacle: “the student treats every moving object as having a forward resultant force,” or “the student uses the area under a distance–time graph as distance.” Those statements point to teachable distinctions. “Needs more practice” is not enough unless the tutor explains what kind of practice and what evidence will show improvement.

Measurement and units: make the quantity explicit

Every measured value combines a number with a unit. A length of 20 mm is 0.020 m, not 0.20 m. If a formula expects metres and the learner enters millimetres without conversion, the arithmetic can be perfect while the physical result is wrong. Write the quantity, conversion and unit before substitution until the process is reliable.

Derived units help explain relationships. Speed in metres per second represents distance divided by time. Density in kilograms per cubic metre represents mass per volume. A student who can explain the unit can often recover the structure of the calculation rather than rely entirely on memory. Units are part of the reasoning, not something added at the end for presentation.

Distinguish mass from weight. Mass describes the amount of matter in the school model; weight is the gravitational force on that mass. For an illustrative calculation using a stated gravitational field strength of 10 N/kg, a 2 kg object has weight 20 N. The value of the field strength should come from the question or the applicable instructions, not from an assumption that every situation uses the same number.

Measurement also has limits. A ruler reading, a digital balance display and a stopwatch measurement do not justify unlimited decimal places. Students should record data appropriately and avoid presenting calculated precision as though it removes uncertainty in the original measurements. The tutor can ask which measurement is likely to limit the final result.

Motion: distinguish distance, displacement, speed and velocity

A cyclist covers 120 m in 20 s, giving an average speed of 6 m/s. This does not establish that the cyclist travelled at 6 m/s at every instant. They may have accelerated, slowed or stopped. Average speed uses the total distance and total time; it is not automatically the reading at a particular moment.

Distance and displacement differ. A runner completing one lap returns to the starting point, so the displacement for the whole lap is zero even though the distance travelled is not. Consequently, average velocity over that complete return can be zero while average speed is positive. The distinction depends on direction and endpoints, not on the runner’s effort.

Acceleration is a rate of change of velocity. If velocity increases uniformly from 2 m/s to 10 m/s in 4 s, the acceleration is 2 m/s². The unit records a change in metres per second during each second. A student should explain that meaning rather than treat the squared second as a notation to copy.

Ask what assumptions support a calculation. A relationship for uniformly accelerated motion should not be applied indiscriminately to a journey with arbitrary changes. Drawing a simple sequence or graph can make the conditions visible. The purpose is to choose a model that fits the information, not to use the most elaborate equation available.

Motion graphs: axes determine the interpretation

On a distance–time graph, gradient represents speed. A horizontal segment indicates no change in distance during that interval. On a speed–time graph, gradient represents acceleration and the area under the graph represents distance travelled. Similar-looking lines therefore have different meanings depending on the axes.

For a speed–time graph showing a constant 4 m/s for 5 s, the rectangular area is 20 m. If speed rises uniformly from zero to 4 m/s over those 5 s, the triangular area is 10 m. Reading only the final speed would miss the difference in the journey. A sketch makes the comparison easier to understand.

Students should state the interval they are interpreting. A steep section can show a high rate of change, but it does not necessarily identify the largest value of the quantity. Read the vertical coordinate for the value and the gradient for the rate. Confusing height with slope produces errors in many Physics topics beyond motion.

When estimating a gradient from data, use an appropriate line or curve and a clearly identified interval. Do not choose two nearby points simply because they are easy to read if that makes the estimate unstable. Explain what the gradient means physically and include the corresponding unit.

Forces: motion does not require a non-zero resultant

An object travelling at constant velocity has zero resultant force in the standard school model. It can still have several forces acting on it. For example, a driving force may balance resistive forces. “No resultant force” does not mean “no forces,” and “moving forward” does not by itself prove that the forward force is larger.

Draw a force diagram for one specified object. Label weight, normal contact force, tension or other relevant interactions, with directions. Do not combine forces acting on different objects into one resultant. A reaction pair belongs to two interacting bodies; it does not cancel within the force balance of a single body merely because the forces are equal and opposite.

For an illustrative horizontal resultant of 12 N acting on a 3 kg mass, F = ma gives an acceleration of 4 m/s². This predicts a change in velocity, not necessarily the object’s current velocity. The student should identify the resultant rather than substitute a single force while ignoring other forces present.

Friction is also not always simply an obstacle to movement. It can provide the interaction needed for walking or driving. The direction and role depend on the situation. Asking what would happen without the interaction can help a learner replace an oversimplified statement with a more useful physical explanation.

Moments, pressure and density: use the correct geometry

A moment depends on a force and the perpendicular distance from the pivot to the force’s line of action. If a 20 N force acts at a perpendicular distance of 0.30 m, its moment is 6 N m. The distance is not automatically the full length of a handle or the sloping distance to the point where the force is applied.

For equilibrium, the relevant conditions include balanced forces and balanced turning effects. A student should identify clockwise and anticlockwise moments about a chosen pivot and explain the distances used. A diagram with a labelled pivot often prevents more errors than immediate substitution into a formula.

Pressure is force per area. The same force distributed over a larger area produces a smaller pressure. The area must be converted consistently: square centimetres cannot be treated as though they were square metres. Ask the learner whether the predicted change makes sense before accepting the numerical result.

Density compares mass with volume. Two objects of the same material can have different masses because their volumes differ, while retaining the same density under comparable conditions. A larger object is not automatically denser. The tutor can use a table of masses and volumes to test whether the student identifies the ratio rather than the largest number.

Energy, work and power: separate amount from rate

Work done by a constant force along the direction of motion is force multiplied by distance in that direction. An illustrative 15 N force moving an object 2 m along its line of action transfers 30 J. The force and displacement relationship matters; multiplying any force by any distance in the question is not a valid method.

Power is the rate of energy transfer. A device transferring 600 J in 3 s has an average power of 200 W. Another device transferring the same energy in 6 s has half that power. The total energy and the speed of transfer answer different questions, just as distance and speed do in motion.

Efficiency compares useful output with total input using consistent quantities. If 80 J of useful output is obtained from 200 J input, the efficiency is 40%. The remaining energy is not destroyed; it is transferred in ways that are not useful for the specified purpose. Identify that purpose before deciding which output counts as useful.

In energy diagrams, follow transfers and stores carefully. Avoid using “energy is used up” as an explanation of disappearance. A useful response identifies where energy goes and why it becomes less useful for the task. This makes unfamiliar devices easier to analyse without needing a memorised paragraph for each one.

Thermal physics: temperature is not the same as transferred energy

Two containers can be at the same temperature while containing different amounts of material. They do not therefore have identical internal energies. Temperature and the energy associated with the particles are related concepts, but one reading does not specify the total energy of every system regardless of mass and substance.

For heating without a change of state, E = mcΔT connects energy transfer with mass, specific heat capacity and temperature change under the model’s conditions. Using an illustrative mass of 0.5 kg, specific heat capacity of 4200 J/(kg °C) and temperature rise of 10 °C gives 21,000 J. The temperature change is the final temperature minus the initial temperature, not simply the final reading.

During a change of state, energy can be transferred without the same temperature rise. Students should distinguish a heating section of a graph from a melting or boiling section. Explaining every flat region as “the heater stopped working” ignores the physical process represented.

Conduction, convection and radiation also need distinct explanations. Convection involves bulk movement in a fluid; radiation can transfer energy without a material medium. A statement that all three occur because “hot particles rise” is incorrect. Ask which mechanism fits the material and arrangement in the question.

Waves: identify what travels and what oscillates

A wave transfers energy while particles of a medium, where a medium is involved, oscillate about their positions rather than travel with the disturbance over the whole distance. A floating object moving up and down as a wave passes can illustrate this distinction, although real water motion is more complicated than the simplest classroom model.

Frequency counts oscillations per second, while wavelength measures the spatial repetition. For a wave with frequency 5 Hz and wavelength 2 m, the wave speed is 10 m/s. Increasing frequency does not automatically increase speed in a given medium; the relationship among speed, frequency and wavelength must be considered together.

Amplitude concerns the size of the oscillation, not the spacing between peaks. Students often identify the full peak-to-trough distance as amplitude, so practise measuring from the equilibrium position. In diagrams, label which axis shows displacement and which shows position or time; a displacement–time graph is not a spatial snapshot.

Reflection, refraction and diffraction describe different behaviours. Refraction involves a change associated with entering another medium; diffraction concerns spreading around obstacles or through openings. Naming the phenomenon should be followed by an explanation of the relevant conditions, rather than a familiar word attached to any bent-looking wave diagram.

Light and sound: use a diagram to make the reasoning visible

For refraction at a boundary, draw the normal at the point of incidence before measuring angles. Angles of incidence and refraction are measured from the normal, not the surface. A ray entering glass from air at an oblique angle typically bends towards the normal because its speed changes; at normal incidence its direction does not bend even though the speed changes.

When light crosses a boundary, frequency remains the same while speed and wavelength can change. This is a useful check on explanations. A student who changes all three without a reason may be treating the wave equation as three independent facts rather than one connected relationship.

For a sound echo returning after 0.40 s, with a stated sound speed of 340 m/s, the sound has travelled 136 m in total. The reflecting surface is 68 m away if the path is out and back along the same route. The factor of two comes from the journey, not from an arbitrary rule for echo questions.

Practical work with light and sound should follow the school’s safety arrangements. Do not look at the Sun through optical equipment, aim intense light at eyes or use excessive sound levels to imitate an example. The educational aim is to interpret rays and waves, not to create an unsafe demonstration.

Electric circuits: current is not consumed

In a simple series circuit, the same current passes through each component. A lamp transfers energy, but it does not use up the charge so that less current returns to the source. This misconception often persists when students describe electricity as a substance that disappears inside devices.

Consider two ideal resistors of 2 Ω and 4 Ω in series across a 12 V supply. Their total resistance is 6 Ω, giving a current of 2 A. The potential differences are 4 V and 8 V respectively, adding to the supply potential difference. The example connects the series rules with V = IR rather than requiring separate memorised answers.

In parallel, branches share the potential difference across their endpoints, while the total current is the sum of branch currents. A diagram can look different after wires are rearranged on the page without changing the electrical connections. Ask students to trace junctions and identify shared endpoints instead of relying on the visual position of components.

A voltmeter measures potential difference across a component; an ammeter measures current through a branch. Their connections therefore differ. Any practical circuit should use suitable school equipment and supervision. This guide does not provide instructions for working on mains wiring, household appliances or high-voltage systems.

Electrical energy and safety reasoning

Electrical power can be related to potential difference and current. A component operating at 6 V with a current of 0.5 A transfers energy at 3 W. Over 20 s at that constant power, the transferred energy is 60 J. The student should distinguish power from the energy accumulated over a time interval.

Units such as the kilowatt-hour describe energy, not power. A fictional 1.5 kW device operating for two hours uses 3 kWh under a constant-power assumption. Calculating a monetary charge would also require a stated tariff; an article should not invent a current electricity price or imply that a classroom example is a household bill estimate.

Safety explanations should identify the function of a protective measure rather than treat all protection as interchangeable. Insulation, earthing and circuit interruption address different aspects of risk. Use the syllabus’s context and school instructions. A learner’s ability to answer a safety question is not a qualification to inspect or repair electrical installations.

When evaluating a circuit explanation, ask whether it correctly separates current, potential difference, resistance, power and energy. These quantities are related but not synonyms. A precise sentence about the relevant relationship is more useful than saying that a device receives “more electricity.”

Magnetism and electromagnetic effects

A magnetic field is represented by a pattern that indicates direction and relative strength. Field lines are a model, not physical threads that can be collected. A student should interpret the direction convention and the pattern around a magnet or current-carrying conductor without confusing the drawing with the object itself.

Changing the direction of current changes the associated magnetic field direction. Increasing current or altering a coil can change the field in ways the course explores. The tutor should ask learners to predict a change and justify it before presenting a memorised rule. A prediction followed by a reason reveals more understanding than recalling a diagram alone.

Electromagnetic induction concerns an induced electromotive force associated with a changing magnetic linkage. Merely placing a stationary magnet beside a stationary coil does not guarantee a continuing induced current. Students need to identify what changes, whether a complete circuit exists and what measurement is being discussed.

In generator and motor explanations, distinguish energy input and output. A motor converts electrical energy into mechanical transfer; a generator operates through a different direction of conversion. The presence of a coil and magnet in both devices does not make their roles identical. A labelled energy pathway can clarify the difference.

Nuclear physics: distinguish randomness from a predictable population trend

Radioactive decay is random for an individual unstable nucleus, while a large population can exhibit a predictable statistical pattern. Half-life is the time for the number of undecayed nuclei, or the activity of a suitable sample, to fall to half its value. It is not the time until every nucleus has decayed.

If a sample’s activity falls from 800 to 200 units over two half-lives, it has halved twice: 800 to 400 to 200. A further half-life gives 100, not zero. This repeated proportional change differs from subtracting the same amount in every equal time interval.

Distinguish irradiation from contamination. Exposure to radiation and the presence of radioactive material on or within an object are different situations. The course’s safety reasoning should be taught using approved materials and institutional procedures, not improvised experiments or handling of unknown sources.

When balancing a nuclear equation, check the conserved quantities represented by the notation. Do not assume that a chemical balancing method alone describes a nuclear change. The learner should explain what the symbols mean and how the particle or nucleus changes, rather than treat the equation as a pattern of numbers to copy.

Space physics must be included, not left out of the plan

The current Physics course includes space physics, so a revision plan limited to mechanics, electricity and nuclear topics is incomplete. Use the exact syllabus to establish the required depth. A tutor should connect the ideas to familiar models of motion, energy and waves rather than present astronomy as a collection of unrelated names.

For orbital motion, distinguish speed from velocity. An object can travel at constant speed while its velocity changes because its direction changes. A force towards the centre is therefore compatible with constant speed in a circular model. Saying “the forces balance because the satellite keeps moving” misses the change in direction.

A light-year is a distance, not a unit of time. It represents the distance light travels in a year. Students can check this from the structure distance = speed × time. The name can be misleading if learned without the underlying relationship, so ask the learner to explain the unit in words before using it.

Stellar and cosmological explanations should stay within the evidence and the course’s models. A redshift discussion, for example, should connect the observed change in wavelength to the interpretation being made rather than merely state that distant objects look red. Use diagrams and comparisons to make the reasoning visible, and avoid presenting a speculative classroom story as an established measurement.

Practical reasoning: design a measurement that answers the question

A practical question begins with the relationship to be investigated. In an illustrative investigation of the extension of a spring under different loads, the independent variable is the applied force and the measured response is extension. Extension is the change from the original length, not the total length displayed by the ruler.

Relevant controls depend on the setup. Use the same spring, measure from a consistent reference and avoid conditions outside the intended operating range. The student should identify safe limits through the school’s instructions rather than adding loads until something fails. A practical plan is not improved merely by using a larger range regardless of safety or model validity.

Repeats can help reveal variation, but they do not automatically remove a zero error or a consistently poor viewing angle. A useful improvement addresses a specific limitation. “Read the scale at eye level to reduce parallax” is more informative than “be careful.” The explanation should show how the change affects the measurement.

For graph work, label axes and units, choose a suitable scale and interpret the gradient or intercept physically. A line that does not pass through the origin may reveal an offset or a model limitation; forcing it through zero can hide evidence. The conclusion should reflect the measured range and uncertainty, not claim an exact universal law from a small set of data.

Using a small group without hiding individual gaps

One learner can predict the result, another draw the model and a third test the units, but the roles should rotate. After discussion, each student needs an unfamiliar independent question. Otherwise a confident classmate may supply the crucial first step while the group appears to have mastered the topic.

Different follow-up tasks can share a concept. A learner rebuilding foundations may identify forces on one object. A consolidating learner may calculate a resultant and acceleration. An extending learner may explain why an appealing alternative model fails. The tutor should record what each student can now do without hints.

At home, a short explanation and one carefully chosen calculation can be more useful than an entire paper attempted while the concept remains unclear. Later, mixed practice tests method selection. Keep an error record that names the cause, such as confusing a graph’s height with its gradient, rather than simply recording “graphs wrong.”

Parent decisions and progress reviews

Ask whether the tutor teaches the exact 0625 year and route, includes space physics, and can explain how practical skills are supported. Confirm actual group size, facilities, fees, availability, absence arrangements and expected homework. A nearby class is not necessarily suitable if it uses a different specification or relies on repeated demonstrations without independent work.

Review comparable work over several weeks. Look for clearer diagrams, correct unit conversions, better model selection and more specific explanations of experimental limitations. A school score matters, but it should be interpreted alongside the topics assessed and the help used. No fixed number of lessons guarantees an examination result.

A workable timetable includes the journey and the student’s energy, not only the lesson slot. Weekday and weekend sessions can both work when there is time for consolidation. Tuition should make learning more manageable, not create an additional workload that leaves the student unable to complete school tasks or rest.

Frequently asked questions

Does knowing the formulas mean a student is ready?

No. The learner must recognise when a relationship applies, identify the relevant quantities and interpret the result. A formula used in the wrong model can produce a plausible but incorrect answer.

Can Alternative to Practical be prepared without any experimental understanding?

No. It assesses practical reasoning through a written format. Measurements, controls, graphs and evaluation remain important.

Is IGCSE Physics the same qualification as SEC Physics?

No. Check each qualification’s syllabus and entry requirements separately. Recognition for a later course is a question for the receiving institution.

What is a useful early sign of improvement?

The student increasingly explains the physical model before calculating and notices an implausible result without waiting for the tutor to point it out.

Official sources and related guides

Consult the Physics 0625 subject page and 2026–2028 syllabus. Related guides cover Mathematics and Chemistry. Confirm the candidate’s components with the school or examination centre before selecting revision materials.