Some examples of 1, 2, and 3 at work that I've witnessed firsthand: 1. Shaky-but-improving public school drops from a B to a C in district grade. Top-performin

Some examples of 1, 2, and 3 at work that I've witnessed firsthand: 1. Shaky-but-improving public school drops from a B to a C in district grade. Top-performing students try and enroll elsewhere. School funding in this district is tied to enrollment; funding drops. To push enrollment up, school buses in kids who've been expelled from other public schools in the area. 2. Disruptive kid goes to another classroom, where he goes and disrupts another teacher's classroom. Kid learns that if he wants to phone it in for the day, he can act out and be told to leave class. Kid's parents might not be present. Teacher/principal put in difficult position to choose between the child and the school. 3. Kid gets expelled and becomes another school's problem. edit: this echoes djtriptych's comments