caa a22 4500 467988439 CHVBK 20180323112538.0 cr unu---uuuuu 170328e19900601xx s 000 0 eng 10.1007/BF02298271 doi (NATIONALLICENCE)springer-10.1007/BF02298271 A layers-of-necessity instructional development model [Elektronische Daten] [Martin Tessmer, John Wedman] Instructional design and development models are sometimes criticized for being unnecessarily complex and for requiring an unrealistic amount of precision. To counter this criticism, some will argue that the complexity and precision are necessary to help ensure a quality instructional product. This article offers a solution to the problem of practicality versus precision by introducing a "layers-of-necessity” model of instructional design and development. By recognizing that instruction evolves over time rather than emerges fully developed, the model offers an alternative means of achieving quality instruction. Association for Educational Communications and Technology, 1990 Tessmer Martin the Department of Instructional Technology, Media aut Wedman John Educational Technology, Department of Curriculum and Instruction, University of Missouri, 65201, Columbia, MO aut Educational Technology Research and Development Kluwer Academic Publishers 38/2(1990-06-01), 77-85 1042-1629 38:2<77 1990 38 11423 https://doi.org/10.1007/BF02298271 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02298271 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tessmer Martin the Department of Instructional Technology, Media aut NATIONALLICENCE 700 1- Wedman John Educational Technology, Department of Curriculum and Instruction, University of Missouri, 65201, Columbia, MO aut NATIONALLICENCE 773 0- Educational Technology Research and Development Kluwer Academic Publishers 38/2(1990-06-01), 77-85 1042-1629 38:2<77 1990 38 11423 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer