This book examines the use of mixed methods for conducting language and literacy research, defining how and why this approach is successful for solving problems and clarifying issues that researchers encounter. Using research findings, the authors explore how an intermingling of multiple methods expands the possibilities of observation and interpretation and, ultimately, leads to more robust validity and deeper understanding. Mixed methods approaches address the challenges of our contemporary language and literacy environment, with its increasing student diversity and technological advances. On Mixed Methods builds bridges between quantitative and qualitative research, highlighting the conceptual similarities and offering a practical guide to researchers; presents multiple examples of key concepts and offers an annotated list of studies for further reading; and emphasizes the importance of validity in the ever-changing environments in which researchers work.