This document provides an introduction to e-learning, including definitions, benefits, elements, instructional strategies, models, and industry. It outlines 10 learning objectives related to understanding e-learning concepts and ROI. Key benefits highlighted are learner-centric access, flexibility, collaboration, and cost savings. Challenges discussed include the initial costs and integrating technologies. Models of e-learning range from gaining access to taking autonomy in online learning. ROI and Kirkpatrick's levels are frameworks for evaluating e-learning programs.