Audio-visual 1 Central sound system 1 Communication technology transfer and agricultural journalism 1 Computer-assisted instruction 1 Educational Technology 1 Educational technology 1 Internet in education 1 Learning 1 Learning environment 1 Non projected teaching materials 1 Overhead pojectors 1 Planning and preparation of extension teaching materials 1 Pre-Primary Language teaching materials 1 Teaching 1 Teaching Materials 1 Technical writing and presentation 1 Visit and study of differnt organizations 1 communication 1 pictures 1 teaching materials 1