E-learning is designed to teach learners through self-paced, experiential learning based on adult learning principles. It is not simply classroom materials like presentations, notes or recordings converted to a digital format. E-learning uses instructional design models like ADDIE to facilitate learning through interactive online content and assessments to both reinforce learning and evaluate achievement of objectives. It is not virtual instructor-led training, but rather self-directed study meant to problem solve and apply knowledge to real work contexts through formative and summative assessments throughout and at the end of a course.