This document discusses research and development (R&D) in English language teaching. It provides definitions of R&D and describes how R&D aims to improve teaching methods, materials, and student learning outcomes. Goals of R&D in English language teaching include understanding student needs, developing and testing new materials, supporting teacher training, and facilitating collaboration. The document also outlines Jolly and Bolitho's 6-step model for R&D studies: 1) identifying problems, 2) exploring needs, 3) contextual realization, 4) pedagogical realization, 5) physical production, and 6) evaluation. Finally, it summarizes a study that used this model to develop English writing materials for university students and evaluates