Conductors and resistors
Windows, doors, and transparent electrodes (optical properties of conductors)
Insulators and capacitors
Lenses and optical fibers (optical properties of insulators)
Inductors, electromagnets, and permanent magnets
Superconductors and superconducting magnets
Elasticity, springs, and sonic waves
Light particles, electron waves, quantum wells, and springs
Periodical table, atomic spectra, and neon lights
Game is bonds, interatomic bonds
From bonds to bands (and why grass is green)
Free electron waves in metals
Nearly-free electrons
bands, gaps, holes, and zones
Metals and insulators
Semiconductors
LEDs, photodetectors, solar cells, and transistors.