How do I email a list of all my current full-time grad students?

Go to the Students Table and make sure the current Term is displayed. Click Filter and select Graduate from the Program filter and Full Time from the Full Time filter. Click Apply Filter and then click Email Students.

This works because when you click the Email or Export options on the Students Table, your action will reflect what information is shown on the table at the time—this is true for all of the tables and other reports throughout Populi.