American Institute for Research: 

Final Report of the i3 Scale-Up Study

Executive Summary

This i3 scale-up study examined the implementation and effectiveness of a 3-year literacy intervention developed by the Children's Literacy Initiative (CLI). The study was a school-level cluster randomized controlled trial conducted in 55 elementary schools from four states. Implementation results showed a high level of fidelity of intervention implementation across the treatment schools in the four urban school districts that had not previously worked with CLI.