From the How to Perform Residential Electrical Inspections Course.
In this chapter, we'll cover the following;
Standards of Practice
History
How does a GFCI work?
Types of GFCI Devices
GFCI on 2-Wire Circuits
GFCI Location Requirements
Bathroom
Bathtub and Shower Stall Receptacles
Garage and Accessory Buildings
Outdoor GFCIs
Outdoor Deck Outlet
 Laundry
Crawlspace 
Unfinished Basement
Kitchen
Kitchen Dishwasher Branch Circuit
Indoor Damp and Wet Locations
Sink 
Boathouse 
Boat Hoist
Electrically Heated Floors
GFCI Locations
Testing GFCI Circuits