2026 BOY evidence pack

Numeracy screener audit and global modelling evidence

This public microsite collects the 2026 BOY subtest/item audit and the global modelling build/test review in one stable Cloudflare Pages package.

Open BOY audit Open global modelling

Audit 2026 BOY subtest + item audit Expanded reader mode: each subtest brief is open inline, with Wright map, item fit, TCC, and item-curve evidence shown without tab switching. Model review Global modelling builds + tests Stan job completion, sampler diagnostics, sensitivity movement, Year 1 Number Line caveat, hierarchical-subscore/Number-Line/speed premodelling audit, downloads, and next steps.

10Stan jobs reviewed

0divergences / treedepth hits

70no-information items filtered

Operational status M0/current remains live until explicit promotion. Hard-item-filtered 2026 BOY operational accuracy + Number Line is a candidate evidence baseline.