Deaf 2 Deaf children Alexander Graham Bell Association for the Deaf 1 Alexander Graham Bell Association for the Deaf and Hard of Hearing 1 Deafness 1 Educación 1 Education 1 Hearing Aids 1 Hearing Disorders 1 Language 1 Language disorders in children 1 Lenguaje 1 Lenguaje, Trastornos del, en el niño 1 Means of communication 1 Medios de comunicación 1 Niños sordos 1 Persons With Hearing Impairments 1 Programmed instruction 1 Sordos 1 Sordos -- 1