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.

News
New · Foundation CIE Core slides + packs · Angles, Area, Averages, Algebra, Equations, Graphs, Polygons, Ratio, Similar Shapes, Simultaneous Eqns, Speed & Travel, Data graphsNew · LS Topic videos (IMProject) · Similar Shapes, Speed & Travel, Ratio, Polygons, Averages, Area, Straight-line Graphs, Angles, Graphs of Data, Simultaneous Eqns, Solving Equations, Basic Algebra, PythagorasFoundation packs · YouTube lesson slots linked on matching CIE Core slides (3 Nov 2026)Worked exam catalogue · 384 videosCIE 291 · IB 44 · Pearson 49New walkthrough · CIE 0606/21 O/N Q12 — Velocity vectors; time of collisionVideo catalogue updated · 3 Nov 2026New · Foundation CIE Core slides + packs · Angles, Area, Averages, Algebra, Equations, Graphs, Polygons, Ratio, Similar Shapes, Simultaneous Eqns, Speed & Travel, Data graphsNew · LS Topic videos (IMProject) · Similar Shapes, Speed & Travel, Ratio, Polygons, Averages, Area, Straight-line Graphs, Angles, Graphs of Data, Simultaneous Eqns, Solving Equations, Basic Algebra, PythagorasFoundation packs · YouTube lesson slots linked on matching CIE Core slides (3 Nov 2026)Worked exam catalogue · 384 videosCIE 291 · IB 44 · Pearson 49New walkthrough · CIE 0606/21 O/N Q12 — Velocity vectors; time of collisionVideo catalogue updated · 3 Nov 2026

Grade calculator & mark book

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

Grade calculator

International boards only (CIE, Pearson International, IB). Boundaries marked stub are illustrative until official tables are loaded — grades are for planning, not board appeals.

Mark book

Paper scores and AI calendar quick reviews (6Q sessions). Optional question marks build a cumulative revision topic map (metadata only — no paper PDFs).

No entries yet — calculate a grade and save.

Grade calculator & mark book | International Maths Project