A comprehensive, practical guide to effective use of data for school improvement! This hands-on guidebook helps head teachers make meaningful data-based instructional decisions with confidence. In layman's terms, the authors explain the essential statistical and assessment information that administrators need to know what types of data to look at, how to analyze the information, and how to use what they've learned from the data to make critical choices for their schools. As part of the Leadership for Learning Series, this resource: Provides school-level leaders with support in developing and sustaining a schoolwide capacity for continuous improvement Links data-based decision making with issues of accountability, improved learning, and shared mission and goals Includes a glossary, school improvement template, sample forms, and data tools