13:37NumberConcept explainWriting and Simplifying a Ratio - GCSE Maths1st Class MathsSuitable for: Years 7–11 / Grades 6–10 (Lower Secondary + IGCSE)Syllabus links: Classroom-ready explain of fractions, percentages. Use when teaching this topic in Lower Secondary / IGCSE.13:37 · Concept explain · Fractions · Percentages · RatioExternal video — not proof-watched or QC’d by IMProject.
9:15GeometryConcept explainIntroduction to Spheres (1 of 3: General equations)Eddie WooSuitable for: Years 7–11 / Grades 6–10 (Lower Secondary + IGCSE)Syllabus links: Classroom-ready explain of volume. Use when teaching this topic in Lower Secondary / IGCSE.9:15 · Concept explain · VolumeExternal video — not proof-watched or QC’d by IMProject.
15:14AlgebraConcept explainDot Product (1 of 2: Geometric interpretation)Eddie WooSuitable for: Years 7–11 / Grades 6–10 (Lower Secondary + IGCSE)Syllabus links: Classroom-ready explain of vectors. Use when teaching this topic in Lower Secondary / IGCSE.15:14 · Concept explain · VectorsExternal video — not proof-watched or QC’d by IMProject.
10:59GeometryConcept explainLinear transformations and matrices | Chapter 3, Essence of linear algebra3Blue1BrownSuitable for: Years 8–11 / Grades 7–10Syllabus links: Classroom-ready explain of transformations. Use when teaching this topic in Lower Secondary / IGCSE.10:59 · Concept explain · TransformationsExternal video — not proof-watched or QC’d by IMProject.
17:26AlgebraExtensionResearchers thought this was a bug (Borwein integrals)3Blue1BrownSuitable for: Years 8–12 / Grades 7–11Syllabus links: Goes deeper on rates of change, functions. Suitable stretch / club after core teaching.17:26 · Extension · Rates of change · FunctionsExternal video — not proof-watched or QC’d by IMProject.
12:39GeometryConcept explainWhat does area have to do with slope? | Chapter 9, Essence of calculus3Blue1BrownSuitable for: Years 8–11 / Grades 7–10Syllabus links: Classroom-ready explain of area & perimeter. Use when teaching this topic in Lower Secondary / IGCSE.12:39 · Concept explain · Area & perimeterExternal video — not proof-watched or QC’d by IMProject.
31:15NumberConcept explainBut what is the Central Limit Theorem?3Blue1BrownSuitable for: Years 7–11 / Grades 6–10 (Lower Secondary + IGCSE)Syllabus links: Classroom-ready explain of number systems. Use when teaching this topic in Lower Secondary / IGCSE.31:15 · Concept explain · Number systemsExternal video — not proof-watched or QC’d by IMProject.
26:10GeometryExtensionAttention in transformers, step-by-step | Deep Learning Chapter 63Blue1BrownSuitable for: Years 8–11 / Grades 7–10Syllabus links: Goes deeper on transformations. Suitable stretch / club after core teaching.26:10 · Extension · TransformationsExternal video — not proof-watched or QC’d by IMProject.
18:27AlgebraConcept explainLimits, L'Hôpital's rule, and epsilon delta definitions | Chapter 7, Essence of calculus3Blue1BrownSuitable for: Years 8–12 / Grades 7–11Syllabus links: Classroom-ready explain of rates of change, functions. Use when teaching this topic in Lower Secondary / IGCSE.18:27 · Concept explain · Rates of change · FunctionsExternal video — not proof-watched or QC’d by IMProject.
9:45NumberStarterThe Four 4sNumberphileSuitable for: Years 7–10 / Grades 6–9Syllabus links: Classic puzzle using four 4s and operations. Great starter for order of operations and creative calculation.9:45 · Starter · Place value · Indices & rootsExternal video — not proof-watched or QC’d by IMProject.
