Start with David Merrill On Instructional Design. Listen carefully as he discusses the principles of instructional design: "demonstration", "application" and "relevance".
Let's begin with organizing the learning guides for each unit or module of the course.
The learning guide is a “one page” interactive document stating the learning goals and activities used to guide the learner through a unit or module. A learning guide should also include assessment information as well as provide an opportunity for the learner to self-assess.
In the learning guide provided you will see examples of reusable learning objects (RLO), to include teacher-created, online-accessed, and textbook-generated. An RLO is any resource you (re)use with your students to support their learning. The fundamental idea is to organize the learning guide for efficient "one-stop shopping" by your students and their parents.
Many of the RLO's you will need to get started are already made. Technology provides the opportunity to make those and other RLO’s more dynamic and interactive. This is where additional work and a large amount of time will be invested.