Social skills are dynamic developmental constructs typically measured using assessments developed via cross-sectional methods. The measurement model of derivatives (MMOD), a factor analytic approach targeting individual growth trajectories, was used to evaluate the longitudinal factor structure of the Social Skills Improvement System--Rating…

Since 2005 the Robert Wood Johnson Foundation (RWJF) has supported Playworks, an innovative program that provides supervised, inclusive recess programs at schools across the country. Jill Vialet, who founded Play4Kids, the precursor to Playworks, saw the need, particularly in urban elementary schools, for a new kind of recess that included…