The university student sits down next to a 12-year-old pupil in the classroom and he looks at her exercise book, then explains the task. “He helps me in many subjects,” says Christelle, who has been living in Germany for about a year and attends the Neue Oberschule Gröpelingen, a secondary school in the north-western city of Bremen. Sargis Poghosyan regularly supports the girl, who is learning German as a second language, in German, English and math. “She’s very hard-working,” says the 28-year-old. Meanwhile, special education teacher Sabine Jungehülsing, who is supervising the class that day …