I am new to MS Teams and I want to create a Class Teams with Assignment feature and add 'Teachers' as Students for Demo purposes. Is there a possibility of doing this or it will interfere if the teachers want to create their own class?
I have just tested this in an Microsoft 365 EDU tenant
You can 100% add teachers as students to a particular class. It will not impact their permissions elsewhere. It will simply mean that in that class (Team) they will have student (member) permissions instead of teacher (owner) permissions. In other words it will only impact what they can do in that team, not in Teams overall