Abstract: A teaching device for stringed instruments is provided. The teaching device has an elongate board having grooved rails extending in spaced parallel relation along the longitudinal edges of the board for receiving templates. A template card depicting the string, note and fret configuration of the particular stringed instrument being used is first inserted into the grooves of the rails. A second transparent key template is inserted in the grooves over the first template card. The transparent key template has indicating indicia which indicates the proper notes to be played in the chosen key. The board is removably fastened to the neck of the stringed instrument.