1. Structural Design & Load Forces | Stability of Frames and Beams – Understanding triangulation, forces acting on structures, and stress distribution in beams. 2. Composite Materials & Disassembly | Environmental Benefits of Modular Design – Identifying composite materials, their advantages, and the sustainability of disassemblable products. 3. Mechanisms & Motion Types | Lever Systems and Gear Effects – Analyzing friction reduction in pivots, classifying motion types, and determining the impact of spur gears. 4. Electronic Components & Circuits | Identifying Symbols and Functionality – Matching circuit symbols, explaining microswitch terminals, and constructing NAND-based logic circuits. 5. Scaffolding & Bridges | Safety Features and Load Distribution – Evaluating scaffolding stability, bridge load effects, and crack propagation in concrete. 6. Mechanical Advantage & Power Transmission | Improving Efficiency in Machines – Explaining gear mechanisms, increasing leverage in crank handles, and tensioning belt drives. 7. PCB Manufacturing & Timer Circuits | Photoetching Safety and Monostable Operation – Designing PCB layouts, calculating timing components, and explaining 555 timer circuit behavior. 8. Heating System Logic & Control | Using NAND Gates for Circuit Design – Constructing heating control logic, understanding universal gates, and designing relay-based switching circuits.