Names?   Thought about names yet?

Here is my suggestion:  give them unique names, not names that are close.  Don't use, for example:  "Terry and Ted".  "Robert and Sam" would be preferable - in my opinion.  Especially if they are not identical. 

Do you best to treat them as unique individuals - even though they are twins.

My brother and I were in the same classes in school thru second grade.  In 3rd grade, we got split up into different classes;  we stayed in separate classes thru 10th grade. In that grade, we got back into more of the same classes due to the kinds of classes we scheduled.  I would have to say that having us in separate classes thru most of our schooling - for the teachers, for the other kids in the class; and to help us develop as our own individuals.  I would do it again.