The purpose of this article is to demonstrate ways to model nonlinear growth using three testing occasions. We demonstrate our growth models in the context of curriculum-based measurement using the fall, winter, and spring passage reading fluency benchmark assessments. We present a brief technical overview that includes the limitations of a growth…

In 2013-14, Letterland had strong implementation, with moderate to high fidelity within approximately 90% of Wake County Public School System (WCPSS) K-1 classrooms. The impact of Letterland on students' reading achievement was neutral to positive. A significantly higher percentage of WCPSS kindergarten students were at or above benchmark mid-year…

The National Association of State Directors of Special Education (NASDSE, 2005) defines response to intervention (RTI) as the practice of providing high-quality instruction and intervention based on a student's needs, changing instruction and/or goals through frequent monitoring of progress, and applying the student response data to important…

As teachers, administrators, and members of intervention teams use student performance data to inform instructional decisions and monitor implementation of tiered instruction in a Response to Intervention (RTI) model, assuring fidelity of implementation or treatment integrity continues to be a challenge. This article describes how one school…