Study guides

Stress

WJEC·A-Level

Master the WJEC A-Level Psychology topic of Stress, from the intricate biological dance of the HPA axis to the life-saving insights of stress management. This guide provides the precise knowledge, key studies, and exam technique needed to deconstruct complex questions and secure top marks."

Strong and weak acids (HT only): A strong acid is completely ionised in aqueous solution. Examples of strong acids are hydrochloric, nitric and sulfuric acids.

AQA·GCSE

8464

Strong and weak acids (HT only): A weak acid is only partially ionised in aqueous solution. Examples of weak acids are ethanoic, citric and carbonic acids.

AQA·GCSE

8464

Strong and weak acids (HT only): As the pH decreases by one unit, the hydrogen ion concentration of the solution increases by a factor of 10.

AQA·GCSE

8464

Strong and weak acids (HT only): describe neutrality and relative acidity in terms of the effect on hydrogen ion concentration and the numerical value of pH (whole numbers only).

AQA·GCSE

8464

Strong and weak acids (HT only): For a given concentration of aqueous solutions, the stronger an acid, the lower the pH.

AQA·GCSE

8464

Strong and weak acids (HT only): use and explain the terms dilute and concentrated (in terms of amount of substance), and weak and strong (in terms of the degree of ionisation) in relation to acids

AQA·GCSE

8464

Structure

OCR·GCSE

This guide provides a comprehensive overview of Musical Structure (4.8) for OCR GCSE Music. It covers essential forms from Western Classical and Popular Music, equipping candidates with the theoretical knowledge and aural recognition skills needed to secure top marks in the listening exam.

Structure and calculation

AQA·GCSE

8300

Turn awkward square roots into exact answers that earn marks. This Higher-tier guide explains how to simplify and calculate with surds, rationalise denominators and show clear working when algebra and geometry bring these skills together.

Structure and calculation

AQA·GCSE

8300

From microscopic measurements to millions of people, standard form replaces strings of zeros with a coefficient and a power of ten. Master conversion, calculation and interpretation to secure marks on both AQA GCSE Mathematics tiers, including non-calculator questions. This guide focuses on N9 within section 3.1.1, not the whole Structure and calculation section.

Structure and calculation: apply systematic listing strategies

AQA·GCSE

8300

Structure and calculation: apply the four operations, including formal written methods, to integers, decimals and simple fractions (proper and improper), and mixed numbers – all both positive and negative understand and use place value (eg when working with very large or very small numbers, and when calculating with decimals)

AQA·GCSE

8300

Structure and calculation: calculate exactly with fractions

AQA·GCSE

8300

Fractions reward accurate, orderly thinking: make equal parts before adding or subtracting, cancel factors when multiplying, and use a reciprocal when dividing. This N8 skill is assessed across both GCSE tiers, and exact fractional work keeps multi-step answers reliable on every AQA paper.

Structure and calculation: calculate exactly with multiples of π

AQA·GCSE

8300

Structure and calculation: calculate with fractional indices (Higher tier only)

AQA·GCSE

8300

Structure and calculation: calculate with roots, and with integer indices

AQA·GCSE

8300

Structure and calculation: including use of the product rule for counting (Higher tier only)

AQA·GCSE

8300

Structure and calculation: order positive and negative integers, decimals and fractions use the symbols =, ≠, <, >, ≤, ≥

AQA·GCSE

8300

Structure and calculation: recognise and use relationships between operations, including inverse operations (eg cancellation to simplify calculations and expressions) use conventional notation for priority of operations, including brackets, powers, roots and reciprocals

AQA·GCSE

8300

Structure and calculation: use positive integer powers and associated real roots (square, cube and higher), recognise powers of 2, 3, 4, 5

AQA·GCSE

8300

Structure and calculation: use the concepts and vocabulary of prime numbers, factors (divisors), multiples, common factors, common multiples, highest common factor, lowest common multiple, prime factorisation, including using product notation and the unique factorisation theorem

AQA·GCSE

8300

Structuring a presentation effectively

OCR·GCSE

This guide focuses on structuring a presentation effectively for OCR GCSE English Language (Component 02, Section B). It breaks down the key skills of organisation (AO5) and technical accuracy (AO6) needed to achieve top marks by crafting a cohesive, convincing, and rhetorically powerful speech.

Structuring sentences and paragraphs

OCR·GCSE

This study guide focuses on mastering sentence and paragraph structure for the OCR GCSE French writing exam (J720). It provides a detailed breakdown of how to use complex grammatical structures, manipulate time frames, and use idiomatic language to achieve top marks in the 90-word and 150-word tasks.

Subprograms

Pearson Edexcel·GCSE

Pearson-GCSE-Computer-Science

Subprograms are the building blocks of efficient, professional code. By breaking large problems into smaller functions and procedures, you make your programs easier to write, test, and maintain—a core skill that examiners test heavily in both theory and practical papers.

Summary and synthesis: identifying the main theme or themes; summarising ideas and information from a single text; synthesising from more than one text

Eduqas·GCSE

C700QS

This study guide focuses on Assessment Objective 1 (AO1): the ability to identify explicit and implicit information, summarise ideas concisely, and synthesise evidence from multiple texts. These are foundational reading skills tested across all GCSE English Language specifications.

Superpower relations and the Cold War, 1941–91

Pearson Edexcel·GCSE

Pearson-GCSE-History

This study covers the dramatic final chapter of the Cold War from 1970 to 1991, tracing the journey from the fragile peace of Détente through the tense 'Second Cold War' to the ultimate collapse of the Soviet Union. Understanding this period is crucial for explaining how half a century of superpower rivalry abruptly ended, reshaping the modern world.

Superpowers

Pearson Edexcel·A-Level

Pearson-A-Level-Geography

This topic explores how superpowers and emerging powers exert significant influence over the global economic system, primarily through international organizations, transnational corporations (TNCs), and the promotion of specific economic ideologies like capitalism and free trade. Understanding this is crucial for the exam as it connects economic power to broader geopolitical dominance.

Supply and Factors Influencing Supply

OCR·GCSE

This study guide provides a comprehensive overview of the concept of supply in OCR GCSE Economics (J205). It focuses on the critical distinction between movements along the supply curve and shifts in the curve, equipping students with the knowledge to analyse how producers make decisions and to secure high marks in the exam.

Surds

OCR·GCSE

Surds are irrational roots like √2 that cannot be written as fractions. Mastering surds is essential for exact arithmetic in GCSE Further Maths, as examiners demand rigorous working without decimal approximations. This guide covers simplification, operations, rationalising denominators, and applying surds in geometric contexts to secure full marks.

Surface Pattern

OCR·GCSE

This guide provides a comprehensive overview of Surface Pattern for OCR GCSE Art and Design, focusing on the practical skills, theoretical knowledge, and portfolio strategies needed to excel. Candidates will learn to master repeat structures, analyse key practitioners, and develop a strong personal response to achieve top marks."