The Learner-Centered Battery (LCB) is a set of short self-assessment tools for teachers and their students that can help teachers identify profiles of effective beliefs, practices, and discrepancies between teacher and student perspectives. Personalized feedback is available for interpreting individual profiles relative to profiles of the most effective teachers in large-scale validation samples. This feedback helps teachers identify areas for potential change and helps them reflect on and change classroom practices. The purpose of this manual is to provide an overview of the research and conceptual model behind the LCB and to describe the development and validation of the middle and high school level student and teacher surveys that are the primary focus of the LCB. The manual is designed for researchers and educators interested in implementing the LCB survey tools and reflection strategies with high school and middle school teachers and students. A two-phase validation process is reported that focuses on the reliability and content validity of the surveys and the construct and predictive validity of the teacher and student variables measured by the LCB. Results of the validation are reported for 9,722 students and 908 teachers. The following sections are included: (1) "Introduction"; (2) "Background and Rationale for the Development of the Learner-Centered Battery"; (3) "Development and Pilot Testing of the Surveys in the Learner-Centered Battery"; (4) "Validation of the Learner-Centered Battery"; (5) "Conclusions and Implications for Professional Development"; (6) "References"; and (7) "Appendices." Eight appendixes contain the student and teacher surveys, feedback examples, files for Statistical Package for the Social Sciences (SPSS) analysis, and other supporting material. An attached disk contains SPSS syntax files for the manual. (Contains 36 references.) (SLD)