THE LEYTON SOTO MODEL
Leyton Soto observed the linear nature of the Tyler model and the separation of the three sources of objectives. He eliminated some of the objectives to the Tyler model and added some of his refinements and clarifications as seen in Fig. 3. He charted three basic elements: philosophy, psychology and sources; three basic processes: selection, organization, and evaluation; and three fundamental concepts: objectives, activities, and experiences. Significantly he showed clearly the interrelationship among the various components of the model. He distinguished between learning experiences and learning activities. He defined objectives as the combination of experiences that the learner tries to achieve. Furthermore these experiences are the behaviors that are written into the objectives and activities are selected and organized, but only experiences, i.e. the terminal behaviors, are evaluated. Thus, the Leyton model presented an integrated or comprehensive model for curriculum development from the point of selecting objectives to the point of evaluating experiences.