On Monday, Principal Peter Galvin welcomes the committee that will evaluate Ribicoff High School for accreditation-just as someone guns down a student outside the main entrance.On Tuesday, homicide cop Abigail Teague tells him she fears that the shooting will incite a gang war. On Wednesday, student teacher Kim Dombrowik finds drugs in a student's locker, and there's a riot in the school cafeteria.Thursday really sucks.And the evaluation committee...