{ "metadata": { "title": "Introduction to 3D Printing", "description": "A high-school introductory course in additive manufacturing anchored to PLTW engineering pedagogy, ASTM/ISO 52900 terminology, America Makes workforce competencies, and community-college articulation pathways. Covers CAD, slicing, FDM and resin printer operation, materials science, Design for Additive Manufacturing, troubleshooting, safety, and modern sub-$5K printer technology including multi-color/multi-material, CoreXY motion, Klipper firmware, and AI failure detection.", "creator": "Dan McCreary", "date": "2026-05-07", "version": "1.0", "format": "Learning Graph JSON v1.0", "schema": "https://raw.githubusercontent.com/dmccreary/learning-graphs/refs/heads/main/src/schema/learning-graph-schema.json", "license": "CC BY-NC-SA 4.0 DEED" }, "groups": { "FOUND": { "classifierName": "Foundation Concepts", "color": "SteelBlue", "font": { "color": "white" } }, "HIST": { "classifierName": "History And Context", "color": "DarkSlateBlue", "font": { "color": "white" } }, "STND": { "classifierName": "Standards And Terminology", "color": "Teal", "font": { "color": "white" } }, "PROC": { "classifierName": "AM Process Families", "color": "DarkGreen", "font": { "color": "white" } }, "EDP": { 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