To contribute to increasing the quality and quantity of communication between staff and adults with intellectual disabilities, training was undertaken to enhance the awareness and knowledge of signing as a method of communication. Multidisciplinary team members, residential and day centre staff were trained to use 20 core signs. Training methods employed included: a training session; a training video; and a training card showing the 20 signs. Caregiver knowledge of the 20 signs was assessed between 6 and 12 months following implementation of the training. Information was also collected about the level of exposure to each of the training methods, and about staff perceptions of the usefulness and effectiveness of the different training types. Training was considered effective by staff, especially the formal training. Trained staff were significantly more accurate at signing, although this knowledge and capability did not often translate into everyday use of signs.