This document discusses John Hattie's concept of "Know Thy Impact" and how teachers can maximize their impact on student learning. It suggests that teachers should ensure students know the learning intentions, what success will look like, and strategies they can use to be successful. When teachers make the learning goals clear and provide appropriate challenges and feedback, students are better able to drive their own learning. The document promotes the use of Understanding by Design framework and lists resources on Visible Learning and Hattie's research on instructional strategies that significantly improve student achievement.