Author
Marlbridge Academic Team
Teaching and curriculum
The Academic Team byline credits material written by Marlbridge's teachers and academic team together, rather than by one named teacher. It is an organisational credit, not a person.
Articles
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exam preparation
Where IGCSE Mathematics marks are lost early
The first weeks of an IGCSE Mathematics course rarely go wrong on difficulty. They go wrong on method, command words, rounding and units — four habits that cost marks a student had already earned.
24 August 2026
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curriculum guides
Choosing subjects at IGCSE and A Level
How subject choices at 14 and 16 affect university options later, and how to keep pathways open without overloading a timetable.
28 July 2026
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exam preparation
Understanding mark schemes and examiner reports
Mark schemes explain how marks are awarded; examiner reports explain why they were lost. Reading both changes how a student answers a question.
21 July 2026
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study skills
How to revise for a science examination
Most science revision fails because it rereads notes instead of retrieving them. A practical method for revising physics, chemistry and biology in the weeks before a paper.
14 July 2026
Resources
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Study Guides
Crude and Standardised Rates: O Level Statistics 4040 and IGCSE 0479 Study Guide
How to calculate crude rates and standardised rates (death, birth, fertility and accident rates), why standardisation is needed, and how to compare populations — Cambridge O Level Statistics 4040 Topic 7 and IGCSE Statistics 0479 Topic 9, with a full worked example.
Cambridge · O LEVELS, IGCSE
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Practice Questions
Crude and Standardised Rates: O Level Statistics 4040 and IGCSE 0479 Practice Questions
Original practice questions with full worked answers on crude rates, age-specific rates, standardised rates and working back from a rate to a number of events — O Level Statistics 4040 Topic 7 and IGCSE Statistics 0479 Topic 9.
Cambridge · O LEVELS, IGCSE
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Study Guides
Index Numbers: O Level Statistics 4040 and IGCSE 0479 Study Guide
Price relatives, weighted aggregate index numbers with weights from base-year expenditure, what an index number means, and its limitations — Cambridge O Level Statistics 4040 Topic 8 and IGCSE Statistics 0479 Topic 10, with a worked example.
Cambridge · O LEVELS, IGCSE
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Practice Questions
Index Numbers: O Level Statistics 4040 and IGCSE 0479 Practice Questions
Original practice questions with full worked answers on price relatives, weighted aggregate index numbers (given and calculated weights), interpretation and limitations — O Level Statistics 4040 Topic 8 and IGCSE Statistics 0479 Topic 10.
Cambridge · O LEVELS, IGCSE
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Study Guides
Time Series, Moving Averages and Seasonal Variation: O Level Statistics 4040 and IGCSE 0479 Study Guide
Time series graphs, moving averages (with centring when the cycle has an even number of seasons), trend lines, mean seasonal variation and predictions — Cambridge O Level Statistics 4040 Topic 10 and IGCSE Statistics 0479 Topic 12, with a full quarterly worked example.
Cambridge · O LEVELS, IGCSE
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Practice Questions
Time Series and Moving Averages: O Level Statistics 4040 and IGCSE 0479 Practice Questions
Original practice questions with full worked answers on 3-point and centred 4-point moving averages, trend lines, seasonal components and predictions — O Level Statistics 4040 Topic 10 and IGCSE Statistics 0479 Topic 12.
Cambridge · O LEVELS, IGCSE
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Study Guides
Cambridge International AS & A Level Mathematics 9709: Circular measure – Study Guide
Radians, arc length, sector area, segments and tangent problems taught step by step with worked examples, for Cambridge 9709 Pure Mathematics 1.
Cambridge · A LEVELS
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Practice Questions
Cambridge International AS & A Level Mathematics 9709: Circular measure – Practice Questions
Twelve original circular measure questions on radians, arcs, sectors, segments and tangents, with mark-by-mark answers, for Cambridge 9709 Paper 1.
Cambridge · A LEVELS
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Revision Notes
Cambridge International AS & A Level Mathematics 9709: Circular measure – Revision Notes
Condensed 9709 circular measure notes: radian conversions, arc and sector formulas, segment and tangent methods, and an 11-question self-test.
Cambridge · A LEVELS
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Practice Questions
Cambridge International AS & A Level Mathematics 9709: Coordinate Geometry (Pure Mathematics 1) – Practice Questions
12 original Cambridge 9709 Paper 1 coordinate geometry questions with mark-by-mark answers on lines, circles, tangents and intersections.
Cambridge · A LEVELS
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Revision Notes
Cambridge International AS & A Level Mathematics 9709: Coordinate Geometry (Pure Mathematics 1) – Revision Notes
Condensed Cambridge 9709 Paper 1 revision notes on coordinate geometry: line forms, perpendicular bisectors, circles, tangents and a self-test.
Cambridge · A LEVELS
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Study Guides
Cambridge International AS & A Level Mathematics 9709: Pure Mathematics 1 Differentiation – Study Guide
Study guide to Cambridge 9709 Paper 1 differentiation (section 1.7): chords and limits, the chain rule, tangents, rates of change and stationary points.
Cambridge · A LEVELS