Field Divisions
The Field is the background of the shield.
Per Pale
Split in half vertically
Per Fess
Split in half horizontally
Per Bend
Split in half diagonally from right to left (remember that the right and left of the shield assumes you are behind it holding it)
Per Bend Sinister
Split in half diagonally from left to right
Per Chevron
With a inverted V shape
Per Saltire
Split diagonally both ways
Quarterly
Also known as per cross. Divided into 4 quarters.
Gyronny
Divided both Quarterly and Per Saltire