A2 classroom poster · 420 × 594 mm. To export: print this page to PDF, choose paper size A2, margins None, and switch on Background graphics. Scale must stay at 100%. The QR points at the student page — it resolves to the hosted URL when this file is opened locally, so print from the hosted copy if that URL ever changes. Everything below the fold here is one single printed page; this grey band is screen-only and never prints.