A colloquium is a conference at which people present papers and contribute to discussions on specific topics. A students' colloquium is therefore a conference attended (and possibly managed and led) by students.
students
because they either are having problems or they just like to be mean
== ==
students dying
the students
It's not clear - I think you mean, "Either the students or the teachers can join." Or perhaps you mean, "Both students and teachers can join."
students desk
Students in my school. Alumnos means "Students", "Pupils" or "Alumni" (former students) depending on usage.
Aristotle
Be good students .
the golden mean
It means "We are students".