This document defines key concepts in instructional technology. It provides definitions of technology and instructional technology from various scholars. Technology is defined as the systematic application of knowledge to practical tasks. Instructional technology is defined as applying knowledge of human learning to teaching and learning tasks. The document also summarizes components of instructional design for teachers, including lesson planning, determining learner abilities, content emphasis, instructional strategies and techniques, sequencing materials, and evaluation. Instructional development refers to designing instructional programs using objectives and systematic procedures by determining who learns what, how content is communicated, and how learning is assessed. The document outlines the ten elements of instructional design.