1. Layers-of-Necessity Instructional Development Model Joshua Weis EDCI513 September 27, 2007

2. Background on Authors Martin Tessmer Ph.D., Flordia State University, 1982 Professor of Instructional Design, University of South Alabama John F. Wedman Ph.D., University of Oklahoma, 1981 Associate Professor of Educational Technology, University of Missouri - Columbia

3. Overview of Model

4. Traditional ID vs. LoN TraditionalLayers of Necessity

5. Traditional ID vs. LoN Traditional Task Closure Layers of Necessity Task Enhancement

6. Traditional ID vs. LoN Traditional Task Closure Procedure-Based Design Layers of Necessity Task Enhancement Principle-Based Design

7. Traditional ID vs. LoN Traditional Task Closure Procedure-Based Design Discrete Stages Layers of Necessity Task Enhancement Principle-Based Design Merged States

8. Traditional ID vs. LoN Traditional Task Closure Procedure-Based Design Discrete Stages Comprehensive Perspective Layers of Necessity Task Enhancement Principle-Based Design Merged Stages Opportunistic Perspective

9. Traditional ID vs. LoN Traditional Task Closure Procedure-Based Design Discrete Stages Comprehensive Perspective Effectiveness-Based Layers of Necessity Task Enhancement Principle-Based Design Merged States Opportunistic Perspective Efficiency-Based

10. Examples of Layers of Necessity

12. Conclusion Realistic assessment of time and resource constraints Guidelines for using LoN Level Layers Address all items in layer Personalization

13. Layers-of-Necessity Instructional Development Model Sources: Tessmer, M. & Wedman, J. (1990). A Layers-of-Necessity Instructional Development Model. Educational Technology Research and Development. 38(2), 77-85. Wedman, J. & Tessmer, M. (1991, July). Adapting Instructional Design to Project Cicumstance: The Layers of Necessity Model. Educational Technology, 55, 48-52.