Dr. Greene's guest on today's program is Tuija Lehtinen, a school psychologist in Haninge, Sweden, who is currently overseeing a project in which the Collaborative & Proactive Solutions (CPS) model is being implemented in all 16 public schools, with children aged 6-16. Tuija filled is in on how her school system has organized the effort, along with some of the bumps in the road so far.