Electron Flow vs Conventional Current

Current is a flow of negatively charged electrons repelling one another. It use to be thought that the current flow was moved from the positive end to the negative end, but studies show it's actually the opposite.

Electron Flow
An electron flow is a movement of electrons in a circuit. The electrons are moving
from the negative to the positive side of the circuit. 

Conventional Flow

In a conventional flow, the electrons are moving from the positive to the negative side of the circuit.