The analysis of data for instructional decision making is a hallmark of the 21st century. Teachers and administrators alike need a process that links instant, consistent, and relevant data to instant, consistent, and relevant results. Data! Dialogue! Decisions! describes a simple process--selecting a piece of data, dialoging about the data, and making SMART goal decisions about how to increase student performance--that includes the critical elements for powerful school improvement: meaningful teams, managed data, and measurable goals. Using a collegial process, administrators and teachers choose their own school of class achievement data to analyze and interpret as they target "e;breakthrough"e; instructional decisions that yield rapid and quantifiable results. Results have been staggeringly successful.