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"The results of research on the effectiveness of four alternative instructional media are reviewed: traditional classroom instruction, instructional radio, instructional television, programed instruction, and computer-assisted instruction (CAI). It was concluded that students learn effectively from ... more
"Media for instruction can be characterized as big (expensive) or little (inexpensive), but research evidence suggests that whether a student learns more from one medium than another depends at least as much on how the medium is used as on what medium is used. Thus, this report discusses not only ex ... more
"The objective of the two week long 1972 Dag Hammarskjold Seminar was to break away from traditional and theoretical concepts of information work in order to gain a practical insight into communication, especially as it applies to social and economic development. Fifty participants and lecturers fro ... more
"El Centro Audiovisual Nacional del Ministerio de Educación inició sus actividades - en la línea de acción que hoy lo distingue - a fines de 1958 [...] la experiencia acumulada en todos estos años por el Centro Audiovisual Nacional le ha permitido definir dos grandes metas esenciales de trabajo ... more
"El autor pretende, con este estudio, intentar un análisis global del trabajo del agrónomo, llamado erróneamente "extensionista", como educador; pretende resaltar su indiscutible e importante tarea, junto a los campesinos (y con ellos), la cual no está correctamente comprendida en el concepto de ... more
"This guide provides educational planners with an awareness and understanding of communication satellite technology, its current uses, and some of the tentative plans for educational experimentation. The first part introduces the general nature of communication satellites in terms of technological c ... more
"This report is the outcome of an expert mission, undertaken at the request of several Member States in the African region, by Unesco with the co-operation of the International Telecommunication Union and the Economic Commission for Africa. The mission approached its task from the point of view of t ... more