The document summarizes four instructional design models:
1) The Gerlach & Ely Model focuses on analyzing learners, specifying objectives, and assessing entry behaviors.
2) The Heinich, Molenda, Russell & Smaldino (ASSURE) Model includes analyzing learners and setting, selecting resources, and evaluating objectives.
3) The Newby, Stepich, Lehman & Russell (PIE) Model centers on planning, implementing, and evaluating instruction.
4) The Morrison, Ross & Kemp Model emphasizes specifying objectives, identifying problems with instruction, and revising based on learner performance data.