One morning, a young boy named Sela sits on the stairs at his home in Chamkar Ou commune in Pursat province. This was the first time we met him, but we could not communicate with one another. Sela is seven years old, and lives with profound hearing loss. The staff of Krousar Thmey, trained in Cambodian Sign Language, tried to communicate with him using signs, but still there was no response. He has never learned any sign language to communicate with people outside his family.