National Implementation of RTI National Implementation of Response to Intervention (RTI): Research Summary By John J. Hoover, University of Colorado-Boulder Leonard Baca, University of Colorado-Boulder Emily Wexler-Love, University of Colorado-Boulder Lauren Saenz, University of Colorado-Boulder Abstract. The current national trend in today's schools is to meet the needs of struggling and at-risk learners through the implementation of multi-tiered response to intervention models. This research sought to better understand the national perspective of RTI by investigating the level of emphasis of current and projected state-wide efforts for implementing RTI from the perspectives of special education state department directors in all 50 states and the District of Columbia.