Can I list an educational paper in my publications?
It is very simple: everything that is published is a publication. However, some authors choose to only list peer-reviewed publications. In both cases your educational paper qualifies.

Of course you are free to list certain types of publications in separate sections on your CV if you think it is better. How that is viewed depends on the person reading the CV. For what it's worth: in my opinion any list of publications has papers that are better than others even if it is all original research. There is no reason to list it separately.