A program designed to improve behaviors characteristic of impulsivity and inhibition by enhancing children's real-life problem solving thinking skills is provided for use by parents and teachers of four- and five-year-old children. Twenty minutes of daily lessons are administered in small groups (or to a single child at home), in combination with problem solving dialoguing techniques when real problems arise at school or at home. The two problem solving skills that most highly relate to improved behavior are ability to: (1) name alternative solutions to interpersonal problems (e.g., wanting a toy another child has), and (2) name relevent consequences of an act (e.g., grabbing that toy). Studies have shown that problem solving training not only helps to improve existing behavioral difficulties, but follow-up of youngsters from nursery to kindergarten shows that adjusted youngsters in nursery are less likely to show behavior problems in kindergarten if trained than if not trained. (Author/RH)