Professional psychologists work in almost every sphere of contemporary life. They contribute to the design of our classrooms and what takes place in them. They teach industry the best ways to select and motivate employees. They provide crucial insight into the background of social problems such as suicide, addiction and child abuse. They help coaches to train athletes, help the police to investigate crime, help managers to reduce stress in the workplace and help the health services to design effective health promotion campaigns (for example, anti-smoking and safe driving campaigns).