This document discusses the application of technology in education. It notes that technology can increase student learning and teacher efficiency while decreasing time spent on learning. Interactive technology can foster meaningful learning and development of critical thinking and teamwork. Technology serves both traditional and constructivist roles in education - as a teacher itself and as a tool for students to build their own understandings. Different types of instructional media are described based on their sensory modality, projectedness, user interactivity, dimensions, pacing, cost, and electronic requirements. Principles for selecting appropriate media include relevance to objectives, authenticity, interest, organization, and cost-effectiveness.