Past Projects

Professional Learning Communities (PLCs) rose to prominence in the 1990s to support and empower educators. Solution Tree’s PLC at Work model, which seeks to “empower educators to work collaboratively in recurring cycles of collective inquiry and action research to achieve better results for the students they serve,” systematizes collective staff development through continuous improvement cycles, an approach originally developed in management consultancy. This development process encompasses goal and standard setting, refinement of instructional skills, and other collaborative practices. These structured collaborative activities are designed to produce significant long-term outcomes, including increased student academic achievement, higher student engagement in learning, improved teach­er retention, and the development of schoolwide collective responsibility for learning outcomes. Our evaluation focuses on improved academic achievement and teacher retention.

The evaluation used publicly available data from the Indiana Department of Education (IDOE) between 2014 and 2024 and deployed k-nearest-neighbor or k-NN, a machine learning matching algorithm to identify comparable schools. Program effectiveness was evaluated using difference-in-difference regression analysis.