Based on 1,364 children across Grades 1, 3, and 5, the present study explored the mutualism of (externalizing and internalizing) behavioral problems and language, and whether social skills explained such mutualism. The random intercept cross-lagged panel models were conducted to control for between-person level variance and to explore mutualism of…

The purpose of this study was to explore the effectiveness of a universal classroom-based social-emotional learning (SEL) program for first grade students. Forty classrooms from 13 elementary schools across 3 states participated in the trial. Teachers in classrooms randomly assigned to the implementation condition were provided with free access to…