Agenda:
Analog
Analog to digital
Interfacing to a 3 pin potentiometer
Now with only 2 pin2
AREF

:What you need to bring:
Yourself
A computer with the Arduino software installed on it
Arduino UNO v3 compatible board and USB cable
Breadboard

:Optional:
Breadboard wires if you have them
Any resistive sensor(s) you are interested in