This document outlines topics related to educational technology including what educational technology is, its roles, and conceptual models of learning. It defines educational technology as designs that engage learners through reliable techniques to promote cognitive learning strategies. The roles of educational technology are described as delivery vehicles for instruction, sources of knowledge, and partners in the learning process that engage learners actively and cooperatively. Conceptual models discussed include the Cone of Experience involving different experiential learning modes, and constructivist learning theories of meaningful, discovery, and generative learning.