ADDIE Model
From the University of Washington: "The acronym “ADDIE” stands for Analyze, Design, Develop, Implement, and Evaluate. It is an Instructional Design model that has withstood the test of time and use. It is simply a “device” to help us think through a course’s design. Though the model appears linear, it does not have to be followed rigidly or in a linear approach, especially if you already have course materials developed."