The purpose of this study was to critically review the empirical evidence surrounding three assertions presented by FlagHouse concerning Snoezelen[R] environments in day school public education settings. Given the absence of empirical literature examining the use of Snoezelen[R] in day school settings, the authors analyzed five studies that were conducted in residential settings. Findings indicate inconsistent effects of Snoezelen[R] environments on observable behavior, generalization of behaviors, and relaxation. With the increasing use of Snoezelen[R] in the American educational system, investigation of its efficacy is needed, particularly because of recent legislation calling for reliance on evidence-based practices. With the current paucity of empirical research, Snoezelen[R] environments do not meet the standards of evidence-based practice. (Contains 2 tables.)