...
So my advice is to do your own thing with the badges. Cally has a two-column Word doc that works fine. She suggests you print two copies of the list of names the first week, and then add a new copy or two when you have the corrections made. Then you can just cut out a new paper copy when a badge is lost or mangled.
The class badges are usually made for the second or third week of class. If some people drop out after they're made, it's not a big deal, you've only wasted a little paper since the plastic part is reusable.