The maths curriculum, chapter by chapter.
Pick your year. For each chapter: the idea in one sentence, one complete reasoning, the classic mistake, two exercises and one Coach question.
Maths › Collège › 3e
Powers and scientific notation
3e · Numbers and calculation
Arithmetic: prime factors and irreducible fractions
3e · Numbers and calculation
Square roots and rational numbers
3e · Numbers and calculation
Algebra: double distributivity and a² − b²
3e · Numbers and calculation
Equations: zero products and x² = a
3e · Numbers and calculation
Histograms, frequencies and range
3e · Data handling, functions
Probability: two-stage experiments
3e · Data handling, functions
Proportionality and percentage change
3e · Data handling, functions
Linear and affine functions
3e · Data handling, functions
Volume of the sphere and compound quantities
3e · Quantities and measures
Effect of transformations on lengths, areas and volumes
3e · Quantities and measures
Coordinates on a sphere and sections of solids
3e · Space and geometry
Rotations and homotheties
3e · Space and geometry
Thales’ theorem (butterfly) and similar triangles
3e · Space and geometry
Trigonometry in the right triangle
3e · Space and geometry
Programming: custom blocks and parallel scripts
3e · Algorithms and programming
The chapters follow the Ministry of Education’s programmes published in the Bulletin officiel. For 2026-2027: cycle 3 (6e) from BO no. 16 of 17 April 2025; cycle 4 new programme (5e) from BO no. 10 of 5 March 2026, and the 2020 programme (4e and 3e) from BO no. 31 of 30 July 2020; seconde and première spécialité from BO spécial no. 1 of 22 January 2019; terminale spécialité from BO spécial no. 8 of 25 July 2019.
What every chapter page contains.
The same skeleton everywhere, so a student finds their way from one chapter to the next.
See the example: Pythagoras, 3eThe idea in one sentence
What the chapter says, before any formula.
One complete reasoning
A worked example, every step visible.
The classic mistake
What most students who get it wrong do, and why it’s tempting.
Two exercises
One direct, one where you have to recognise the situation.
One Coach question
A demonstration of Coach’s correction on this chapter. No account.
Before and after
Prerequisites to check and the chapter that comes next.