This is an inspiration Powerpoint I made for when we study GRAFFITI art in class.
It goes through the main elements - bold use of letting, stencils, etc.
It also includes lots of inspirational images.
We do a follow-up project where they have to write something in a graffiti style - using mixed medium (stencils, watercolours, pastels etc.).
They do them on huge paper.
TIP - We also have a a place called "graffiti ally" here in downtown Toronto - so we take the kids on a trip to here to take photos and sketch. They REALLY get inspired by this.