TTeaching colorTeaching colorde Norman A. Calkins · Publicada por primera vez en 1877MateriasColorStudy and teachingEdiciones (1)Teaching color (1877)E. Steiger · inglésMás obras de Norman A. CalkinsManual for teachers, to accompany Prang's aids for object-teachingManual of object-teachingA manual to accompany Jeffers' panoramic apparatus for teaching reading