<prompt> The best method of teaching an urban slum about ORS isLectureRole playDemonstrationFlash cards  <response>: Demonstration A demonstration is a carefully prepared presentation to show how to perform a skill or procedure.Demonstration as a means of communication has been found to have a high educational value in programmes like-Environmental sanitation installation of a hand pump, construction of a sanitary latrine.Mother and child health demonstration of oral rehydration technique,Control of disease, e.g. scabies. 