Sanders, J. R., & Cunningham, D. J. (1973). A structure for formative evaluation in product development. Review of Educational Research. 43(2), 217–235. Sapountzoglu, G. (1998). Vocational education and training and new technology: Summaries of thematic units. Vocational Education and Training in Europe on the Threshold of the 21st Century (pp. 85–86). Germany: UNESCO-UNEVOC. Shata, O. (2001, July). A Critique Of Stephen Downes' Article, "Learning Objects": A Middle Eastern Perspective. International Review of Research in Open and Distance Learning, 2(1). Retrieved October 28, 2002, from the World Wide Web: http://www.irrodl.org/content/ v2.1/shata.pdf Shepard, S. (1997). The new economy: what it really means. Retrieved from the World Wide Web: 0http://www.businessweek.com/1997/46/b3553084.htm Silberman, H., Coulson, J., Melaragno, R., & Newmark, G. (1964). Use of exploratory research and individualized tutoring techniques for the development of programmeming methods and theory: Final report. (National Defence Education Act Project 7-14-0000-181). Santa Monica, CA: Systems Development Corporation. Singh, M. (2000). Combining work and learning in the informal economy: Implications for education, training, and skills development. International Review of Education, 46(6), 559–620. Smith, A. (1979). Generic Skills Secondary School Vocational Model for Craft Trades. Ottawa: Canada Employment and Immigration. Snow, R.E. (1976). Aptitude-treatment interactions and individualized alternatives in higher education. In Messick, S. (Ed.), Individuality and learning: Implication of cognitive styles and creativity for human development. San Francisco, CA: Jossey Bass. Sparkes, J. (1982). Pedagogic differences between media. In Bates, A. W. (Ed.) (1982). The role of Technology in Distance Education, Croom Helm, London/St. Martin’s Press, New York. Stavrou, S. (1998). New technologies and the production process: Changing patterns of production and the need for effective vocational education and training. Vocational Education and Training in Europe on the Threshold of the 21st Century (pp. 23–25). Germany: UNESCO-UNEVOC. Stern, D. (1997). The continuing promise of work-based learning. The National Centre for Research in Vocational Education. Centre Focus No. 18. Stern, D., Bailey, T., & Merritt, D. (1996). School-to-work policy insights from recent international developments. National Centre for research in Vocational Education, Berkeley: CA., MSD-950.
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