David Twitchell

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Concepts: Research in distance education: A system modeling approach

Farhad Saba, David Twitchell, Farhad Saba, 1988 .

In conversation: no.3: an overview of M. David Merrill's new component design theory

David Twitchell, 1990 .

In conversation: ICAI, computers in the schools, an instructional design expert system

David Twitchell, 1991 .

A simplified approach to the application of component display theory

David Twitchell, George Anderton, Kent Parry, 1990 .

Integrated Services Digital Networks: How it Can Be Used for Distance Education

Farhad Saba, David Twitchell, Farhad Saba, 1988 .

Robert M. Gagne and M. David Merrill: In Conversation. No. 7: ICAI, Computers in the Schools, an Instructional Design Expert System.

David Twitchell, 1991 .

Robert M. Gagne and M. David Merrill: In Conversation. No. 5: A Comparison of Robert M. Gagne's Events of Instruction and M. David Merrill's Component Display Theory.

David Twitchell, 1990 .