Academic self-efficacy is a psychological construct that deals with an individual's belief about capabilities to learn or perform educational activities at designated levels. Academic self-efficacy is a critical component in theories of motivation and learning. Studies show that academic self-efficacy is domain-, context- or task-specific and associated with student engagement, study habits, learning styles, and personality. It can also predict and explain a wide range of students’ activities and achievements in culturally and linguistically diverse educational contexts. This introduction provides an overview of the chapters, describes the unique approaches and innovative methods in assessing academic self-efficacy, and synthesizes the studies reported in this book.