This document provides an introduction to action research for teachers. It discusses key concepts of action research including that it is focused on improving practice, owned by teachers, involves systematically examining evidence to produce knowledge about what works in a particular context. It also notes action research is collaborative and aims to problem-pose rather than problem-solve. The document provides some examples of action research questions and models, including describing a problem, intervention, data collection and understanding if the intervention is successful. It aims to give teachers an overview of action research and how it can be applied to improve teaching practices.