The phrase "data-based decision making" has been used so often in discussions about school improvement efforts that it has become almost a mantra. However, it's "how" data is used that really provides the critical link between practice and school improvement. "Data-Based Decision Making 2.0" is designed to help principals take on the role of data-informed leadership. The book discusses preconditions for effective data use, developing a data use process, using data to assess the effectiveness of school programs, using assessment data to improve instruction, response to intervention and data use, using data to reduce the dropout rate, and using teacher observation data to improve instruction. The table of contents contains the following: (1) Introduction; (2) Preconditions for Effective Data Use; (3) Developing a Process; (4) Using Data to Assess the Effectiveness of School Programs; (5) Using Assessment Data to Improve Instruction; (6) Response to Intervention (RTI) and Data Use; (7) Using Data to Reduce the Dropout Rate; (8) Using Teacher Observation Data to Improve Instruction; and (9) Summing Up. References are also included.