Electricity - the flow of electrons
Ohm's Law sates that voltage(V) drives current(I) through a resistance(R).
The three can be represented by : I=V/R Where I is given in amps, V is given in volts, and R is given in ohms.
Voltage is the potential difference between two points. But that explanation doesn't really help, so I would recommend thinking of it as the amount of push for the electrons to flow.
Current is a measure of how many electrons are flowing.
Resistance is how much a material resists the flow of electrons.
Faraday's law tells us that the flow of electricity creates a magnetic field, and that a magnetic field can cause voltage.