http://www.davidvl.org/250CourseSpr04/digesthome.htmA very brief article which divided Instructional Development Models into three basic categories: classroom situations (Classroom ID), standalone products (e.g., CD-ROMs) (Product Orientation ID), and large scale institutional training (System Orientation ID).In the first situation, the designer has contact with the learner; in the second most likely little to none; and the third, little to no contact with the learner.This article is an interesting and straightforward breakdown of the various fundamental models of IT.