The model

Rigour Without Rigidity

Rigour without rigidity means the sequence of knowledge is genuinely demanding and genuinely ordered, while the route through it is set by the child's interests rather than by a timetable.

Its role

What this does in the system.

It is the reason WSA is an education rather than an enrichment programme. The freedom is in the doorway, not in the standard.

Relationships

How it connects to the rest of the model.

It governs how Worlds progress, how Explorations increase in complexity, and how mastery is judged against observable evidence rather than completion.

In practice

A concrete example.

A child may reach ratio through gear teeth instead of a textbook chapter — but they are held to the same understanding of ratio, and it is recorded only when they use it unprompted on an unfamiliar problem.