Different User types, same search results question?

Hey Guys,

Wondering if anyone can help me with this little chesnut??
I am developing an app that has two different user types, lets say, student and teacher.

A teacher or a student can both create “a group” and a regular user can then search through all of these groups together. So there is no real difference between the two as far as a regular user can see.

Is it best practise to separate this into two tables so I would have a student_group table and a teacher_group table?

My question is how do you group the two together so the two can be displayed in search results?

Cheers

Stuart