In the field of professional development (PD) in TESOL, personal practical knowledge of TESOL teachers has brought about the shift from a decontextualized presentation of theories and practices of English language teacher education to a sociocultural perspective (Crandall & Christison, 2016). Such a perspective can be adopted through actually getting involved in professional organizations such as the American Association for Applied Linguistics (AAAL) or a local organization like Thailand TESOL, joining conferences onsite to develop TESOLers' soft skills and networking, or simply forming a community of practice for materials development among the teachers in the same department. On the TESOL International Association website, a guide to PD is provided. Nine possible ways for PD and tips for making PD successful and sustainable can be adopted for novice, mid-career, or even semiretired TESOL educators (TESOL International Association, 2024).