FAKULTAS BAHASA DAN SASTRA KARYA ILMIAH DOSEN BAHASA INGGRIS (S2) Bahasa Inggris 20040803 Syntax and Grammar Case Study Challenges Effective EFL teacher English skill English speech training English writing First Language Good EFL adult learner Interference Key words: effective interaction Language Education Learning Interest Learning strategy Listening Comprehension Metode Penelitian Phonology Podcast Reading class SAFMEDS Student of Islamic boarding school case study characteristics of the effective teachers communication styles cross-sectional study effects emailing good language learner language learning strategy millennial era pedagogical competence personal competence politeness positive case study positive politeness strategies professional competence reason social competence students’ perception teacher questions two classes types vocabulary vocabulary learning vocabulary size test