In today's educational world, it is crucial for language teachers to continuously evolve in order to best serve language learners. Further study on the best practices and challenges in the language classroom is crucial to ensure instructors continue to grow as educators. The "Handbook of Research on Language Teacher Identity" addresses new developments in the field of language education affected by evolving learning environments and the shift from traditional teaching and assessment practices to the digital-age teaching, learning, and assessment. Ideal for industry professionals, administrators, researchers, academicians, scholars, practitioners, instructors, and students, this book aims to raise awareness regarding reflective practice and continuous professional development of educators, collaborative teaching and learning, innovative ways to foster critical (digital) literacy, student-centered instruction and assessment, development of authentic teaching materials and engaging classroom activities, teaching and assessment tools and strategies, cultivation of digital citizenship, and inclusive learning environments.