Protesters clash with riot police Thursday during ongoing mass demonstrations of high school students at Place de la Bastille, Paris, as part of a nationwide protest movement over learning conditions. Since late September, pupils have barred the entrances to hundreds of schools, complaining of teacher absences, overloaded timetables, dilapidated classrooms and buildings ill-adapted to rising temperatures, among other grievances. Kenzo TRIBOUILLARD — AFP via Getty Images