"Student protest" is such a common phrase in the UK (or at least it used to be) that I'm surprised it doesn't auto-complete on Google.

I did find myself wondering about what students protest about these days, and found this example (from 2009):

"Students who occupied their university for three days to save its cleaners from being deported claimed victory today. Up to 60 students at the School of Oriental and African Studies (Soas) in London took over the principal's office on Monday."

http://www.theguardian.com/education/2009/jun/17/soas-occupa...

Students protesting to try and protect some of the least powerful people in our society - now that's a student protest.

Edit: Here is a recent example from France where students protest against a deportation of someone to Kosovo:

http://www.bbc.co.uk/news/world-europe-24575182