Education in Turkey is governed by a national system which was established in accordance with the Atatürk Reforms after the Turkish War of Independence. It is a state supervised system designed to produce a skillful professional class for the social and economic institutes of the nation.
With this in mind, it's almost guaranteed they're all just pissed off and have no idea what they really want out of it, aside from showing a whole lot of discontent.
Except that "Ataturk" was an extreme secularist and the current government has "islamic roots". So what the education system thought to people older than 20-25 is in complete contradiction to the point of view of the current government.
However the current government is successful economically. And they are not really "islamists". They are more like the Christian democrats in Europe, I guess.
So, while I agree, there is some twist.
If it isn't a protest against islam then it needs to become that. It would really be the best thing for the region. The best thing for Turkey would be overthrow of the current government and a return to something secular... combined with the EU pulling prospective status over it.