I think content knowledge is very important and sometimes overlooked. Some become to concerned with the bells and whistles of the technology and try to create an innovative way to use the tech. However, if it is not rooted in an important knowledge base to the content the person is teaching, the technology is meaningless. As an instructor and as I coach, I first consider what content is important.

I am a BIG fan of TPACK learning theory and use it in my practice as a teacher and a coach. Knowing why we do what we do in the classroom, and knowing how it is supported by research and theory, is very important for quality online learning (IMHO).

To be honest, I had not considered this factor because my online work has been in an adult learning environment and I have never noticed any troubles in this area. However, I can see the need to work on this if teaching high school kids; they often make some poor decisions when typing online!