Violin or viola teaching aids are disclosed that are suitable to be attached to either a violin or viola bow. The aids with elongated raised ridges provide a tactile indication of the proper placement of the right hand on a bow. An embodiment is disclosed that has a cylindrical shape with a hollow passageway that fits over the stick of a bow. A plurality of holes provide lateral openings into the hollow passageway. The rims of the holes provide a tactile indication of the location in which the fingers and thumb are to contact the bow. Embodiments are disclosed that are comprised of resilient sponge rubber.