NEW DELHI, July 10 -- A 45-year-old government school mathematics teacher, who was also serving as a booth level officer (BLO) for the Special Intensive Revision (SIR) exercise, allegedly attempted suicide on Wednesday. A note recovered from him cited work pressure, police said. The teacher is undergoing treatment at a city hospital and remains critical, police said. Employed at a government senior secondary school run by the Directorate of Education in north Delhi, the teacher, who suffers from asthma, sustained serious injuries. "He is likely to survive, but the incident could leave him with long-term complications such as paralysis or permanent disability," his 55-year-old brother-in-law said. Officials said he had recently been assigned...