SCHOOL enrollments are increasing year by year, but qualified teachers are leaving the classroom in droves. More than a million veteran teachers are nearing retirement, and more will follow.

• 学校的入学人数一年年地在增长，但是高质量的教师正在成群结队地离开教室。超过一百万的资深教师正面临退休，更多的人也正跨入这一行列。