Book excerpt: The Handbook is intended for all researchers in education and the social sciences─undergraduate students to advanced doctoral students and research faculty. Part I provides an introduction to basic quantitative research methods, including analysis and interpretation of statistical tests associated with each method. Examples of qualitative designs and mixed methods research are also included. A chapter on measurement techniques in education and the social science is provided. Part II of the Handbook includes over a 130 instruments organized under 40 topics, extracted from the research literature. Each instrument is discussed in detail concerning its measurement characteristics used in its development. A section also includes Instruments Available through Commercial Organizations, which provide the latest sources for teacher and principal evaluation. New to This Edition -Enhanced chapters concerning Quantitative research methods with analysis and interpretation of research data appropriate to each statistical test. -Detailed chapter of measurement procedures used in instrumentation development, including the appropriate application of reliability and validity tests, item analysis, and factor analysis with analysis and interpretation of research data. -Introduction to Qualitative research design and appropriate methods, and the application of mixed methods in research design. -Expanded section of actual research instruments available for measurement purposes in education and social science research. -Enhanced section including Instruments Available through Commercial Organizations. This provides the latest sources for teacher and principal evaluation.