China-friendly mirror (cn.improject.org). YouTube may fail on some mainland networks — other resources still work. Global site

Mainland mobile carriers often block or throttle Cloudflare Workers. Reliable phone access needs China CDN (e.g. EdgeOne) and ICP备案 — this mirror is not yet listed on beian.miit.gov.cn.

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Short answers grounded in this site's summaries, Scaffolded Learning Sheets, packs, and videos — with direct links.

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Lower Secondary Area

Maths for ~Year 7–9 / ages ~11–14 — classroom hub for early secondary.

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Worksheets and Review

Searchable worksheets, solutions, and syllabus chapters — filter by strand, type, and level.

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Topic summaries

Short HTML overviews with worked examples in text, plus free worksheet and answers PDFs.

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Topic videos

Topic videos

High-quality YouTube explainers by Number, Algebra, Geometry, and Statistics — filter by subtopic, length, and role.

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Worked Exam Video Solutions

CIE past-paper walkthroughs — search by syllabus code, year, paper, and variant. YouTube embeds.

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Advanced Maths Video Lessons

Suitable for Additional Maths, IB, A-Level and Further Maths students — or for curious maths minds.

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Revision Tools

Pick your syllabus, plan on a calendar, practise with the question bank, and shuffle Formula flash cards.

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Grade calculator & mark book

Score a paper, save grades, and build a cumulative revision topic map.

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GDC by GeoGebra

Full GeoGebra Classic graphical calculator — graphing, geometry, CAS, and 3D. Made with GeoGebra®.

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Exam Boards

Official board catalogues and shadow-style practice paths by syllabus.

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CIE past-paper questions filtered by topic

CIE Topic Selector

Filter CIE past-paper questions by syllabus, Core/Extended, paper, variant, and topic — mark scheme, examiner report, and pre-written walkthrough.

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Past papers

School past papers appear here when your account is authorised.

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Recommended textbooks

Print coursebooks we recommend by syllabus — start with Cambridge IGCSE Additional Mathematics 0606.

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TI-Nspire guide

TI-Nspire CX II for Cambridge IGCSE 0607 — visual menu guide, templates, and exam tips.

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