I have started getting emails from prospective PhD students. The emails are getting from places that I do know about and from places that I have no idea about. For example I am getting a lot of email from Country A.
I do not know anything about this country A's education system and their grading techniques/processes. So I am unable to judge these students that may come from different institutes in country A from their GPA's. This is with the assumption that grading policies in different institutes will be different.
These are primarily undergraduate students but some of them have been exposed to research questions. This is evident from their CV's that they have published some papers. However, the papers are mostly in regional journals and conferences. Also it is difficult to assess how much they might have contributed.
Many of these students need a RA or a TA and I have limited spots. So how do I decide?
One way to decide is to engage a faculty from that country
and forward the students info to them to see what they think of them.