Is there a way to create a mail merge that automatically emails people with a list that meets a given criteria?

I am being sent an Excel spreadsheet with a list of students. I am trying to get a mail merge so that it will take a list of students and send that sub-list to their teacher, via email.

An example will look something like this:

Dave Smith | 7SF
Josie Davis | 7GE
Will Jones | 7SF

How can I create a mail merge that will select all students from 7SF and send that sub-list to their teacher?

I have tried to create the lists dynamically in the mail merge by using the spreadsheet as a directory (which worked), but it will not let me send the document via email that way. The only other way I can think to do it is to create separate emails manually and copy and paste the sub-lists in, which is what I am trying to avoid by using mail merge.