The BIC score Table 1 indicates that quizzes six group answer yields University best fit for University schooling outcomes, but we also current University four group and five group answers. Figure 4 shows that with University six group answer, University smallest group includes no greater than 2% of University inhabitants. The trajectory means clearly show how schooling dynamics play out in observe. For instance, education raises sharply until around age 30, after which is pretty much stagnant at age 40. In University four group answer, University results are ruled by University final schooling level. The four group and five group solutions show adult and extra schooling in action, with 67% of University cohort still on an upward education trajectory at later ages k = 5: 6%, k = 6: 7%. SPRAGUE is quizzes professor of one of a kind education and director of University University of Oregon Institute on Violence and Destructive Behavior, 1265 University of Oregon, Eugene, OR 97403; . He directs federal, state, and local research and demonstration initiatives associated examination useful behavior supports, reaction examination intervention, youth violence prevention, choice schooling, juvenile delinquency prevention and treatment, and faculty safety. WALTER DOYLE is quizzes professor in University Department of Teaching, Learning, and Sociocultural Studies in University College of Education at University University of Arizona, 1430 East Second Street, P. O. Box 210069, Tucson, AZ 85721; . His analysis specializes in school room management, curriculum theory, and University enactment of activities and task in classroom systems.