Study habits at 5-6 are about architecture, not hours — a consistent slot, a settled spot, a calm tone, and done-is-done brevity. The habits built now are the ones exams later run on.
The study habits that matter at fifteen are installed at five — not through longer hours but through the daily architecture: when, where, how it feels, and how it ends.
Nothing in the five-year-old's homework matters academically; everything in the habit does. The child who arrives at Class 6 with a settled slot, a working spot, and a neutral-to-positive study association owns infrastructure that no crash-course later replicates — the entire point of starting now, gently.