Voltage, current, AC vs. DC, power, energy, frequency, phase, and the power triangle — the on-ramp fluency every later module in this program assumes you already have.
Most electrical training jumps straight to code sections and device tables. This module deliberately starts one level up: what voltage, current, and resistance actually are and why Ohm's Law shows up everywhere from voltage drop to fault-current calculations, why the grid runs on AC instead of DC, and why real, reactive, and apparent power are three different numbers with three different jobs.
By the end of this module you should be able to explain, from first principles, why a facility gets billed for low power factor even though it's already paying for every kWh it uses — a question Module 7's power-distribution content answers in full calculation detail.