Desk, man, young, glasses, Paper, pencil, head resting, thinking, portrait, Series, 20-30 years, dark-haired, shirt, Pullunder, gaze upwards, paper stack, empty, blank, pen, thinking, thoughts, boredom, apathetic, Unimaginativeness, unkonzentriert, inattentiveness, examination, disinterest, indoors, background beige, concept, Pisa-Studie, intelligence,