How To Read Music
This is a good overview. It is called "How to read music" by Tim Hansen from TED ed
Learn the musical alphabet!
Lines and Spaces; Very Clever.
More about the "Treble Clef".
EGBDF = Every Good Boy Does Fine
Use FACE to remember the name of the spaces
Videos about rhythm
Practice reading pitch (line and space names)
Practice naming the notes for lines and spaces. Before you start, go into the settings box in the right hand corner and change the pitch range and turn of accidentals. This can be found on http://www.musictheory.net/exercises/note