On Monday, dozens of officers kept a close watch on the school and surrounding streets, but some people say an increased police presence may not be enough to keep students-- many of whom fear gang retaliation -- safe.
Only 53-percent of the students enrolled at Crane High School were in class Monday.
To encourage attendance from Crane students who live in the ABLA Homes, a police escort was provided again on Tuesday to and from the school. Only 25 students of 150 took advantage of the escort.
Chicago Public Schools CEO Arne Duncan compared the deadly shooting to the tragedy at Northern Illinois University.
"It's a little bit to me like the Northern Illinois situation. After that terrible tragedy, it took students a little while to come back there. It's very, very tough on people, but they see the safety and efforts put in going to and from school, and I'm very confident students will come back," said Duncan.
Extra security will be at the school all day Tuesday.