This document introduces action research as a method for teachers to engage in professional learning and development. It describes action research as a cyclical process where teachers identify issues in their practice, develop and implement plans to address these issues, collect data on the results, reflect on what happened, and either modify their plans or identify new issues to address. The document provides an overview of each step in the action research cycle and includes templates to guide teachers through planning and documenting their own action research projects to improve student outcomes. The overall aim is to help teachers build their capacities and continuously improve teaching quality in Papua New Guinea classrooms.