Most likely, you’re creating a course because you have a lot of expertise in a particular area, but it would be unwise to think that you know or can remember everything about that topic. Doing some research and revision at this stage will ensure you haven’t missed anything and help you to consider different ways to communicate the key learning points.
My recommendation is to research your modules generally, rather than focusing in-depth on the lessons you already have planned. This broader approach will allow you to validate your course outline and check if any gaps need filling.
In this lesson, I cover the types of research you should do for each lesson in your course. There is also a helpful workbook to download.