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The use of radio frequency personal response system (PRS) to stimulate the learning activity in large class groups has been tested and found invaluable over a period of 3 years. The paper describes the benefits of using the PRS as well as some of the logistical problems and their solutions as practiced in the Mining Department of the University of Johannesburg. The applicability of PRS particularly in technical modules is confirmed.doi:10.1016/j.sbspro.2015.01.625 fatcat:wvtr272q5za6viatdpycm3kowi