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电视媒体是“空中课堂”中应用较早且效果明显的大众传媒,由于在制作、接收、使用等方面具有着相当广谱的特征,电视在远程教育,特别是中国农村远程教育中发挥着至关重要的作用。一是覆盖面广,传播速度快。据《中国电视收视年鉴》统计,我国家庭电视机拥有率接近100%,因此,理论上,通过电视传播信息覆盖面是最广的;二是投入低,成本效益高。因为电视具有很高的普及率和使用率,无论是受众还是传播者都无需额外投资,节约了教育投入成本,加之电视传送能够打破地域、时间限制,农民能够不离土、不离乡,与生产结合,边学边用,教育的“成本效益”显著;三是形象直
Television media is an earlier and more effective mass media used in the “Air Classroom”. Due to its broad spectrum of features in production, reception and use, television plays a role in distance education, especially in rural China distance education The crucial role. First, the coverage is wide, spread fast. According to the “China Television Watch Yearbook” statistics, China’s home TV ownership rate close to 100%, therefore, in theory, the spread of information coverage through television is the most extensive; Second, low investment, cost-effective. Because television has a high penetration rate and usage rate, both the audience and the communicators need no additional investment, which saves the cost of education investment. Besides, television transmission can break the geographical and time constraints, and farmers can not leave the land, stay away from home and combine with production , While learning to use, education, “cost-effective” significant; third is the image straight