Evidence and Gap Map of Tier 2 Literacy Interventions in CNMI for Grades K-3

In response to a request from the Commonwealth of the Northern Mariana Islands (CNMI) Public School System (PSS), REL Pacific conducted a systematic review of Tier 2 literacy interventions for students in grades K-3. In this review, a Tier 2 literacy intervention is defined as a supplemental instructional program delivered to students who require support in addition to the Tier 1 core reading program. REL Pacific identified 267 studies on Tier 2 literacy interventions, and 20 of these studies met What Works Clearinghouse (WWC) 5.0 standards with or without reservations. Findings from this review showed that two interventions--Reading Recovery and Literacy First--had strong evidence, as defined by the Every Student Succeeds Act (ESSA). One additional intervention--Achieve3000--had moderate evidence, as defined by ESSA. This report includes an evidence and gap map, as well as a supplemental matrix that highlights implementation strategies used by each intervention.