16 Printed educational and teaching materials in the field of music and musical theory; printed instructional material, namely, printed books for teaching music and musical notation; printed instructional material in the fields of music and musical notation; printed educational and teaching materials for music and musical notation; educational equipment for teaching music and musical notation, namely, printed books and printed workbooks both in the field of music and musical notation and an instructional tool being a handheld, printed diagram for teaching music, sold as a unit; printed music in the nature of printed sheet music; printed leaflets featuring information on music theory; printed instructional manuals in the field of musical instruments and musical equipment; printed diagrams for teaching music and musical notation in the nature of a handheld, plastic and paper card with a windowed frame for providing information on music theory; printed diagrams for teaching music and musical notation in the nature of a paper card with a windowed plastic frame for displaying information in the field of music theory for organizing keys, chords, notes, and scales