🖼️ Poster and Demo Checkpoint

Teams assemble an exhibition-ready poster and rehearse a full explanation for elementary visitors and parents using prototype evidence, concise math, and age-appropriate wording. They include a design-process timeline, labeled calculations, test data visuals, and a brief script for audience interaction or performance. The teacher uses a milestone rubric to check that the prototype, poster, and talk are accurate enough to advance to the public showcase.