... experiences and ideas and to participate in group problem solving. The two-way flow of information between farmer and extension worker improved retention and overall learning of participants ... FM, single-sideband AM, digital packet radio and satellite repeaters.Personal radio services such as Citizens' Band Radio, Family Radio Service, Multi-Use Radio Service and others exist ... Thailand, to teach mathematics to school children (Galda, 1984), and for teacher training and other curricula (Faulder, 1984). 2. India, for rural development (Long, 1984). 3. Swaziland, for...