This Encyclopedia provides scholarly information on all aspects of Educational Technology. Educational Technology is seen as a problem-solving process, concerning most aspects of teaching and learning through media and technology, in the context of education and training. Problems may arise in subdomains of education, such as curriculum, instruction and learning, methods and media, or organization and management. In developing solutions, use will be made of many technologies in the narrower meaning of the word - educational aspects and applications of information and communication technology. A variety of education and institutional settings are presented as they determine potential solutions. Entries are organized in five broad categories: (1) educational technology as a concept and as a field and how it is disseminated in different ways; (2) functions such as needs assessment, design, media production, evaluation, diffusion and implementa