Cambridge International · Lower Secondary · CM3
Mathematics Grade 8 — Keywords & Key Terms — Definitions Glossary (2026)
Cambridge Lower Secondary Mathematics Grade 8 (CM3)
Topic-by-topic keywords, key terms and definitions for precise exam language—separate from our revision checklists (topic coverage) and formula sheets (equations).
Keywords & Key Terms — definitions
Examiner-style keywords and definitions organised by syllabus topic. Terms are tagged Essential (start here), Core (typical exam standard), and Advanced for harder distinctions — tick each row when you can recall it. Your progress is saved in this browser for this list.
Cambridge Lower Secondary Mathematics Grade 8 (CM3)
Cambridge Lower Secondary Mathematics Grade 8 (CM3)
Cambridge Lower Secondary Mathematics Grade 8 (CM3)
Aligned to the Cambridge Lower Secondary Mathematics Grade 8 framework for 2026 — the final year before Cambridge IGCSE. Most schools do not sit the optional Cambridge Checkpoint exam, but this is the vocabulary every student needs going into IGCSE.
Mark schemes: Cambridge Lower Secondary is assessed by teachers in class, not by a formal graded exam — the optional Checkpoint test gives a diagnostic score, not a grade. Grade 8 vocabulary (standard form, algebraic fractions) is the direct foundation for IGCSE Mathematics command words.
Active recall: 0 / 19 terms ticked
| Recalled | Topic | Level | Keyword | Definition |
|---|---|---|---|---|
| Number | Essential | Standard form | A way of writing very large or very small numbers as A × 10ⁿ, where 1 ≤ A < 10. | |
| Number | Core | Significant figure | A digit that carries meaning about the size or precision of a number. | |
| Number | Core | Upper bound | The largest value a rounded measurement could actually be. | |
| Number | Core | Lower bound | The smallest value a rounded measurement could actually be. | |
| Number | Advanced | Index (power) | The small number showing how many times a value is multiplied by itself, e.g. the 3 in 2³. | |
| Algebra | Core | Linear function | A function whose graph is a straight line, written as y = mx + c. | |
| Algebra | Core | Gradient | The steepness of a line — how much y changes for every 1 unit increase in x. | |
| Algebra | Core | y-intercept | The point where a graph crosses the y-axis, where x = 0. | |
| Algebra | Core | Simultaneous equations | Two or more equations solved together to find values that satisfy them all. | |
| Algebra | Advanced | Algebraic fraction | A fraction where the numerator, denominator, or both, contain a variable — simplified the same way as number fractions. | |
| Geometry and Measure | Core | Transformation | A change to a shape's position, size or orientation: translation, reflection, rotation or enlargement. | |
| Geometry and Measure | Core | Translation | A transformation that slides a shape without rotating, reflecting, or resizing it. | |
| Geometry and Measure | Core | Cross-sectional area | The area of the flat surface you'd see if you sliced straight through a 3D shape. | |
| Geometry and Measure | Core | Compound measure | A measure made from two other measures, e.g. speed (distance ÷ time) or density (mass ÷ volume). | |
| Geometry and Measure | Advanced | Rate of change | How quickly one quantity changes in relation to another, e.g. speed as distance per unit time. | |
| Statistics and Probability | Core | Outcome | A single possible result of an experiment or trial. | |
| Statistics and Probability | Core | Independent events | Events where the outcome of one does not affect the probability of the other. | |
| Statistics and Probability | Core | Bias | A systematic error in data collection that makes results unfairly favour one outcome. | |
| Statistics and Probability | Advanced | Two-way table | A table that shows the frequency of data across two different categories at once. |
Pair this with our revision checklists, formula sheets hub and past paper finder.
More definitions & key terms for Mathematics Grade 8 topics
Every topic in the Tutopiya Learning Portal has its own keywords & definitions section, plus notes, quizzes and past papers.
More Mathematics Grade 8 definitions & key terms →Mathematics Grade 8 (CM3) — Keywords & Key Terms FAQ
- What is on this Mathematics Grade 8 keywords and key terms list?
- It is a topic-organised glossary of important mathematics grade 8 terms with short, age-appropriate definitions aligned to Cambridge Lower Secondary Mathematics Grade 8 (CM3). It is designed to build the precise vocabulary students need before starting Cambridge IGCSE.
- Is Cambridge Lower Secondary formally examined?
- Mathematics Grade 8 at Cambridge Lower Secondary is assessed by teachers in class, not by a formal graded exam. Most schools do not sit the optional Cambridge Checkpoint test — but the vocabulary here is exactly what students need before starting Cambridge IGCSE, where it is formally assessed.
- Is this the same as a revision checklist or a formula sheet?
- No. Revision checklists help you track which topics you have covered and your confidence — separate pages on Tutopiya. Formula sheets summarise key formulas and facts. This page is only a definitions and key-terms glossary for Mathematics Grade 8.
- Can I download this Mathematics Grade 8 keywords and key terms list for free?
- Yes. After a quick free sign-up you can download a UTF-8 CSV (opens in Excel or Google Sheets) or open a print-friendly page and save as PDF. Browsing the list on the page is free.
- Is this Mathematics Grade 8 list aligned to the Cambridge Lower Secondary framework?
- Topic groupings and wording follow the Cambridge Lower Secondary Mathematics Grade 8 framework for 2026. Always confirm the exact scope with your school, since class-based assessment can vary in pace and depth.
- Why focus on definitions instead of full notes?
- Getting comfortable with precise subject vocabulary now — before Cambridge IGCSE introduces formal mark schemes — makes the transition easier. A compact glossary lets you drill the exact terms for Mathematics Grade 8 at Lower Secondary, separate from longer notes or topic trackers.