Abstract: An instruction system for a string instrument such as a guitar comprising note indicia underlying the strings of the guitar along the fingerboard and adjacent to the frets, a music sheet containing the musical exercise to be practiced, a holder for supporting the music sheet on the fingerboard of the guitar, and a mirror adapted to be positioned in front of the student through which the fingerboard and music sheet can be viewed. The note indicia on the fingerboard of the guitar as well as the musical exercise on the music sheet are written in reverse, that is, from right to left. In addition, the area of the fingerboard underlying the respective strings of the guitar and the notes of the musical exercise on the music sheet are color coded so that the musical exercise indicates to the student which string is to be used in producing the required note.