John M. Keller is one of the most recognized and respected scholars in the field of educational technology and instructional design. He has worked at the junction of psychology, education, and technology. Along with many other contributions, he has developed an instructional design theory that can be used successfully both with traditional and…

Charles M. Reigeluth is one of the most contributing and certainly the leading scholars in the field of educational technology and instructional design. His early contributions were about developing instructional design theories such as Elaboration Theory and Component Display Theory. He has also edited monumental books as collections of major ID…

Professor Reigeluth emphasizes that the work of educational technology researchers should focus on advancing instructional design theories rather than investigating some trendy aspects of utilizing educational media in schools. He makes the point that such an orientation will provide a comprehensive framework for efforts toward improving education…

M. David Merrill is a leading figure in the field of educational technology and instructional design. He has been contributing to our field for about half a century. His contributions have particularly focused on instructional strategies and fundamental learning principles more than the use of educational media and their influences. He has devised…