What problem does it solve? Creating physics teaching visuals for junior middle school often fails on pedagogy: animations look plausible but contain wrong physics, ignore the target misconception, or cannot run in a real classroom. This Skill structures the full workflow from lesson goal and misconception analysis through medium selection, physical model validation, and classroom verification. ## Core Features & Use Cases - Medium Selection: Chooses among web/SVG/HTML/CSS/JS, D3, Manim, and PPT animation based on delivery constraints like offline use, file size, and projector conditions. - Physics-First Design Rules: Requires an explicit minimal model with variables, units, sign conventions, and assumptions, checked via dimensional analysis and limiting cases before rendering. - Classroom Verification: Covers pause/replay/step controls, reduced-motion fallbacks, offline delivery checks, keyboard accessibility, and Chinese label fitting. - Use Case: A teacher needs an interactive circuit demo showing that doubling voltage doubles current at fixed resistance. The Skill defines the misconception, builds the web artifact with parameter controls, and verifies boundary behavior like zero resistance. ## Quick Start Use the junior physics animation skill to design and build an interactive animation explaining refraction for grade 8 students, with pause controls and a static fallback.