In Brief: 
Students place clefs, magic notes in do re mi colors, and grand staff cards on the single clef staff slate to represent the open strings. They play these open strings on their instruments
Learn the open strings on the staff and how each one relates to the instrument
Prerequisite Concepts: 
Familiarity with their string instrument, the ability to follow directions 
Teacher's Role: 
Guide students in using appropriate color and placement of magic notes
Usually once is enough