Students' early problem behaviors in school can be disruptive and even hinder their learning and long-term success. To prevent and address these problem behaviors, schools across the country report adopting multi-tiered systems of support for behavior (MTSS-B). This one-page document highlights findings from "Study of Training in Multi-Tiered Systems of Support for Behavior: Impacts on Elementary School Students' Outcomes," which evaluated a promising, intensive program of MTSS-B training and technical assistance. [For the full report, see ED620900. For the appendix, see ED620902.]