title: The use of signs and the coding of prefix markers by teachers at a school for the deaf.
mesh_terms: D001741:Black or African American; D044383:Black People; D002648:Child; D003638:Deafness / Q000534:rehabilitation*; D006801:Humans; D008369:Manual Communication; D012813:Sign Language; D013019:South Africa; D013663:Teaching / Q000592:standards*