This report reflects research and development on visualization and the use of multimedia carried out at the Department of Applied Education, Division of Instrumental Science and Technology of the University of Twente (Netherlands) and the Andersen Consulting Educational Computing Consortium, also at the University of Twente. The report contains 11 papers organized into three main sections: (1) "Concepts in Instructional Visualisation" includes "Visualisation and Effective Instruction" (Jef Moonen), "Principles and R&D Aspects in Instructional Visualisation" (Ivan Stanchev), "Human Factors and Multi Media Design" (Lex Bergers), "Conceptual Metaphors for the Visualisation in Interactive Learning" (Piet Kommers), and "Functions and Design of Video Components in Multi-Media Applications: A Review" (Plon W. Verhagen); (2) "Design and Development of Multi Media Applications" includes "Designing Multimedia Applications" (Maud van den Meiracker), "Multimedia Development Tools" (Jan Schoenmaker and Erik Nienhuis), "Putting Multimedia into Practice" (Mark Vegting), and "Adaptable Educational Computer Simulations" (Willem Jaap Zwart, Albert F. J. Rhemrev, and Andre M. Berloth); and (3) "Multi Media Technology" includes "A Look at Multimedia" (Jan Evers) and "QuickTime" (Jacob Sikken). Conclusions are drawn by Ivan Stanchev and Jan Schoenmaker. Most of the papers contain references. (TMK)