The Teacher Edition outlines lesson plans and correlates all the books in the 21st Century Guitar Library. Listening, teaching and performance suggestions are included, and the book is especially useful for teachers who are not principally guitarists. Book 1 includes lesson plans and correlates all books in Level 1. [SPANISH] Correlativo a todos los volúmenes de la Biblioteca de Guitarra Belwin 21st Century. Plan de lecciones para el curso: Sugerencias para la ejecución.