What drove Korea's once-revered teachers to despair?

For Kim, a retired teacher in her late 60s, teaching was one of the greatest gifts of her life. Recalling students’ laughter and small parties in classrooms celebrating Teachers’ Day every year, she was a teacher who was revered and appreciated by both students and parents. However, when Kim visited a memorial altar for a Seoul elementary school teacher who took her own life on Sept. 4, she lamented at ho...