This dissertation consists of two articles. The first article describes an architecture for intelligent tutoring that focuses on modularity. This new architecture is based on Gibbons' layers theory for instructional design (2014). Splitting up the architecture for an intelligent tutor into layers allows different pieces to age at different rates which, in turn, allows the intelligent tutor to be adapted to new research and design theories. This architecture supports building intelligent tutoring services, nimble programs that can be assembled together to replicate the functions of intelligent tutoring without the expertise needed to create the services. Alternative architectures support building intelligent tutoring systems, monolithic programs that are less amenable to change and require immense expertise. The second article provides a proof of concept for the first services created under the layers theory. These two services create the building blocks of a domain and comprise one part of the content layer as described in the first article. The first service focuses on the task of key concept extraction whereas the second service focuses on prerequisite relationship extraction. These two tasks can provide the structure of the domain, particularly when it comes to domains that are more declarative in nature rather than procedural.

Title I federal regulations provide funding to school districts to support Supplemental Educational Service (SES) tutoring services to qualified economically disadvantaged K-12 students and that these services should be monitored by school districts to determine its effectiveness. However, a school district in Southern California that is the focus of this convergent parallel design study has not provided sufficient oversight of the SES tutoring program resulting in ambiguity about policy implementation effectiveness. Using a theoretical framework of policy implementation as the foundation, the purpose of this study was to explore the role that quality of service played when administrators implemented the No Child Left Behind Act to evaluate tutoring services supplied by SES providers. Data were collected through a series of interviews with 10 school district administrators who also completed the EDUSERV survey. Data from the interviews were inductively coded and subjected to thematic analysis and descriptive information from the survey were calculated. Findings indicate that SES providers work diligently to support student learning improvement, but the inconsistent oversight by the school district has resulted in disparity in performance scores in educational attainment. The positive social change implications of this study include recommendations to school district leadership to engage in consistent training for leadership in oversight of the SES program as well as improvements in oversight of SES performance in order to enhance outcomes for economically marginalized students