How to design a class

 Course design for any class—both in-person and online—is truly a work of art of science. It requires:

• Planning with the end in mind
• Mapping courses backward to the beginning of the school year
• Designing courses for students who are “on the edge” rather than those “in the mainstream” so that every learner can have an opportunity to begin engaging with the curriculum at a point that is appropriate for their level
• Ensuring that scaffolding is in place at the appropriate proximal zone of development to prepare students to learn at higher levels
• Ensuring that appropriate formative and summative assessments are used so teachers can have clear data on where students are in relation to their learning targets. 

Source: 

https://www.coursera.org/learn/teaching-strategies/supplement/KFA8o/scaffolding-in-an-online-course