Read:
"Notation of Notes, Clefs, and Ledger Lines," Open Music Theory
"Other Aspects of Notation," Open Music Theory
"Reading Clefs," Open Music Theory
"The Keyboard and the Grand Staff," Open Music Theory
"Half Steps, Whole Steps, Accidentals," Open Music Theory
Watch:
"How to Read Music," TED Talks
"How to Read Notes on the Staff," Five Minute Mozart
"Note Naming: Everything You Need to Know in 9 Minutes," Brad Harrison
"Enharmonic Equivalents," Five Minute Mozart
Every Good Boy Deserves Fudge
Elvis’s Guitar Broke Down Friday
Every Good Bird Does Fly
Ecological Garbage Bins Demand Filling
(Nope, that's it)
Great Big Dogs Fight Animals
Go Buy Donuts For Al
Great Britain Did Fight America
Good Burritos Don't Fall Apart
Gorgeous Babes Dig Fancy Apartments
Gopher Babies Defend Family Always
All Cars Eat Gas
Alley Cats Eat Garbage
Alto and Tenor clef both indicate middle C at the center where the two semi-circles join.