This document discusses intervention and common formative assessments. It begins by outlining the "Big 4 Questions" around what students should know, how to assess if they know it, what to do for students who don't know it, and what to do for students who have mastered the material. It then discusses the concepts of immediate, incremental, and prescriptive intervention and provides examples of how intervention can be implemented during the school day. The document also defines common formative assessments and outlines their benefits, including curriculum alignment and informing reteaching and intervention plans.