Chinese teacher Zhang Quanzhi teaches a class at the school on one of the three main Pinghu islands on the lake in Mount Huangshan, eastern China's Anhui province on November 28, 2008. Zhang who has been the only teacher in the school for the last 13 years, now has 12 students, of which five are in pre-school, four in first grade and another three are in third grade. Getty Images logo Getty Images 12 months ago

Chinese teacher Zhang Quanzhi teaches a class at the school on one of the three main Pinghu islands on the lake in Mount Huangshan, eastern China's Anhui province on November 28, 2008. Zhang who has been the only teacher in the school for the last 13 years, now has 12 students, of which five are in pre-school, four in first grade and another three are in third grade.