Geometry is the most underutilized tool for teaching logical reasoning in secondary education — and engineering design is its most compelling context. In this session, participants will explore how tessellations and fractal geometry, expressed across multiple coding environments including Python, Autodesk Fusion 360, and CUDA on NVIDIA hardware, build the same spatial logic that governs the hexagonal crystal domain morphology of transition metal dichalcogenides (TMDs), atomically thin semiconductors at the frontier of post-silicon electronics. Whether you teach math, CTE, or write grants for STEM programs, you will leave with a replicable framework connecting classroom geometry to cutting-edge semiconductor science — scalable from a student Chromebook to a research-grade GPU, no advanced background required.