🔧 Engineering, Circuits & Smart Systems A 9-Week Middle School STEM Unit (Beginner-Friendly!) Looking for a complete, teacher-friendly STEM unit that requires no prior engineering or coding experience? This 9-week Engineering, Circuits & Smart Systems unit is designed specifically for middle school classrooms and teachers new to STEM or Computer Science. Students explore circuits, sensors, coding, and smart systems using TinkerCAD Circuits, while teachers are fully supported with daily