Watch the Gotta Rock online guitar lesson by Brad Carlton from Chord Studies: Rock and Pop Progressions Vol. 1
This rock progression uses power chords and is a great way to practice sliding between chords. The "squeaks" that are made when sliding on your strings can be cool or annoying! So you want to be able to play through this progression with them in there, or without them, by "hopping" to the next chord shape instead of sliding.