Online lessons and paper feedback
IGCSE Science Tuition
You know the formula but cannot use it, or a Biology explanation keeps missing a crucial step. We offer individual Biology, Chemistry, Physics and combined-science tuition, plus paper marking. Work on one subject or one difficulty without buying lessons in all three.
Science lessons for your course
Biology
Explain processes with accurate terms and use them in data and context questions, rather than reproducing the same paragraph of notes for every task.
Chemistry
Work on equations, particles and quantitative relationships, separating what you observe from the explanation of why it happens.
Physics
Practise formula choice, unit conversion, graphs and causal explanations, keeping the calculation connected to the situation.
Separate sciences, Combined Science and double-award science are not one interchangeable course. Cambridge Combined Science 0653 is a single award; Co-ordinated Sciences 0654 is a double award. Both cover all three sciences. Check the exam year, Core or Extended tier where applicable, and the papers you are entering.
- Cambridge: Combined and Co-ordinated Science compared
- Cambridge 0654 syllabus and exam resources
- Pearson Edexcel Science Double Award resources
For Pearson Edexcel, OxfordAQA or another board, use that qualification’s specification. Practical assessment arrangements also differ: a shared subject name is not enough to choose a paper.
From understanding to a complete answer
We distinguish a concept that needs teaching from a concept you understand but cannot yet apply. The first needs explanation; the second needs practice connecting the knowledge, question details and answer steps.
| Subject and content | What we practise | What to check |
|---|---|---|
| Biology: cells, transport, enzymes, inheritance and ecology | Explain processes accurately and connect cause and effect to the organism, organ or conditions in the question. | Does the answer state direction, location and cause, rather than listing keywords alone? |
| Chemistry: particles, bonding, equations, quantities and reactions | Separate observations from particle explanations, and work through formulae, equations and calculations. | Balance by changing coefficients, not formula subscripts. Check units and relationships between quantities. |
| Physics: forces, energy, electricity, waves and thermal physics | Sketch or list known quantities, choose the relationship, convert units and show the calculation. | Does the method match the situation? Were units converted before substitution, and is the result plausible? |
| Data and practical questions across the sciences | Read axes and scales, use values to describe trends, identify variables and explain repeats or method improvements. | Avoid treating a trend as proof of its cause, or assuming repeats remove a systematic error. |
Three science questions to try
We wrote these questions and explanations for independent practice. They are not exam-board questions or official marking guidance.
Biology: state the net direction
A membrane allows oxygen molecules to pass between two solutions. Oxygen concentration is higher on side A than on side B, at the same temperature. Describe and explain the net movement of oxygen.
Read the explanation
Oxygen diffuses from A to B overall, down its concentration gradient from higher to lower concentration. Random molecular movement occurs in both directions: net movement does not mean that every molecule travels one way. Diffusion does not require an added explanation involving active transport or energy supplied by respiration.
Try next: at equal concentrations, have the molecules stopped moving? No. Random motion continues, but there is no concentration-gradient-driven net diffusion.
Chemistry: keep formulae unchanged
Balance Mg + O₂ → MgO.
Check the equation and atom counts
2Mg + O₂ → 2MgO. Each side has 2 Mg atoms and 2 O atoms. The coefficient 2 gives two units of MgO. Changing MgO to MgO₂ would change the substance’s formula, not balance the original equation.
Try next: balance H₂ + O₂ → H₂O.
Answer: 2H₂ + O₂ → 2H₂O. Count each element: both sides contain 4 H atoms and 2 O atoms.
Physics: convert units first
The potential difference across a resistor is 6.0 V and the current is 250 mA. Calculate its resistance.
See the working
250 mA = 0.250 A. From V = IR, R = V ÷ I = 6.0 ÷ 0.250 = 24 Ω. Using 6.0 ÷ 250 would mix volts and milliamps.
Try next: find the resistance at 9.0 V and 150 mA.
150 mA = 0.150 A, so R = 9.0 ÷ 0.150 = 60 Ω. This is a written calculation exercise, not an instruction to build a circuit.
Practical questions: why repeat a reading?
Explain which problem an improvement addresses. Repeats help show consistency and, with appropriate averaging, reduce the influence of random variation. They do not automatically correct a timer that always adds two seconds.
| Reading | Time / s | Context |
|---|---|---|
| 1 | 42 | Repeat under the same conditions |
| 2 | 41 | Repeat under the same conditions |
| 3 | 43 | Repeat under the same conditions |
What can these readings tell you?
The mean is (42 + 41 + 43) ÷ 3 = 42 s, and readings range from 41 to 43 s. The three values are close; that alone does not establish accuracy. A device that consistently adds 2 seconds could still produce these closely grouped readings.
For an unexpected reading, check recording, measurement and conditions, repeat where appropriate and explain how you handle it. Do not delete it simply to make an average look better. When comparing two sets, consider the spread and number of readings too.
Your school or exam centre confirms required practical experience, facilities and assessment arrangements. Online lessons can teach method and data questions; they cannot replace required hands-on work.
Science lesson and marking fees
| Service and fee | When it fits | What you receive |
|---|---|---|
| Single lesson · from £45 | One topic needs teaching, or you want to try a lesson first. | 55 minutes of online teaching, agreed practice and post-lesson priorities. No paid diagnostic is required first. |
| 10 lessons from £399 / 20 from £749 | You need continuing tuition and checks on earlier practice. | 55 minutes each: 9 hours 10 minutes or 18 hours 20 minutes in total. Tutor, subjects, schedule and total price are agreed before payment. |
| Mock marking · £45 for one / £79 for two in the same subject | You have completed a paper independently and want detailed feedback. | Review of the agreed paper, three practice priorities and one written clarification. Live teaching is not included. |
| Optional diagnostic · £35 | There is only a small sample of work and the main difficulty is unclear. | One diagnostic review of agreed material with a next-step recommendation. Not full-paper marking or a compulsory fee before lessons. |
One paper is not a subject’s complete set of exams or a set across all three sciences. Two papers in the same combined-science qualification can be agreed within the scope; separate Biology and Chemistry papers do not automatically form a same-subject pair. We list paper numbers and the total before payment.
If the difficulty is already clear, such as circuit calculations or chemical equations, request a single lesson directly. You do not need to pay for another diagnostic on the same material before booking.
Your Science questions
Can I study Physics without buying Biology and Chemistry lessons?
Yes. Request a single Physics lesson or continuing Physics tuition. If you take a combined or double-award course, send the full course code and paper number so we can match the depth and scope of its Physics content.
Are Combined Science and Co-ordinated Sciences the same?
No. Cambridge 0653 is a single-award qualification and 0654 is a double award. Both cover Biology, Chemistry and Physics, but their content and assessment differ. Similar titles used by other boards should not be treated as interchangeable.
Why do explanations lose marks when I know the facts?
Check whether you apply the fact to the specific question. A diffusion answer needs more than the word “concentration”: identify the particles, net direction and gradient. Short questions help establish whether the link or the underlying concept needs teaching.
Can you teach practical questions online?
We can work on variables, methods, graphs, data, conclusions and evaluation. Online question practice does not replace required practical experience. Actual experiments need suitable facilities, supervision and safety arrangements; do not reproduce activities with chemicals or electrical supplies from an example question.
Does £79 for two papers include two papers in each science?
No. It covers two agreed papers in the same subject or combined-science qualification, not six papers across three sciences. Send each paper cover and number. Separate subjects are not automatically combined into one marking price.
Can lessons help a few weeks before an exam?
Tell us the exam date, content already covered and hardest question types. We confirm tutor availability before agreeing priorities that fit the time. Short-term tuition can address specific difficulties; it is not a promise to teach a whole course in a few weeks.
What to send with your enquiry
- Course title, exam board, code and exam year. A paper cover or school course outline is helpful when you do not know the details.
- A specific question or recent answer, with the task, time used and existing feedback. You do not need a complete mock to enquire.
- The difficulty you want to address, your target and lesson availability with your time zone.
Photograph the complete task and answer clearly, covering unrelated personal details. We confirm tutor, scope, timing and total price before payment. A free enquiry does not include full-paper marking.