(nyt) Last school year, 258 public school students were shot in Chicago, 32 fatally, on their way to or from school, traveling through gang-infested territory and narcotics wars on the South and West Sides. In an effort to get ahead of the next killings, the schools conducted an analysis to identify the 250 students most at risk of being shot (by studying profiles of 500 recent victims). Since December, each of those students has had an advocate like Ms. Tinajero on call to offer caretaking and support 24 hours a day, seven days a week. National experts consider it to be perhaps the most intensive safety intervention tried in big-city schools; its results are being watched nationally.