Where to start

These books are a sequence, not a shelf. Answer two questions and you will land on the stage that fits — or read the whole ladder below.

How old is the student?

What have they already worked through?

Ages are the usual range, not a rule. Adults working alone start wherever the contents look unfamiliar — the tables of contents on each book page are there for exactly that.

The whole sequence

Stage 1 9+

Arithmetic

Whole numbers, divisibility, fractions, decimals, ratio and proportion — every rule derived rather than asserted.

The text

Problems and enrichment alongside it

Stage 6 15+

Geometry of space

Lines and planes, dihedral and polyhedral angles, the regular polyhedra, prisms, pyramids, cylinders, cones, the sphere, volumes.

The text

Problems and enrichment alongside it

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