CDC's E-learning Essentials Guide was developed for course developers and training decision makers who are new to e-learning. The guide aids in the creation of quality e-learning by identifying key instructional components and summarizing what they are, why they are important, and how to use them most effectively. The guide does not provide step-by-step instructions to create e-learning. For best use of the guide's information, some experience in education, adult learning, or instructional design is recommended. Information on the instructional design process and a glossary of frequently used terms are located in the Instructional Resources section.