Teachers are now expected to educate English Language Learners (ELLs) at the same level as native speakers under the No Child Left Behind (NCLB) legislation. However, because there is a dearth of research on teacher attitudes toward ELLs, little is known about how these attitudes will affect instruction. The primary goal of this research is to look at the influence of instructors' conduct on students' English competence at the secondary level. The influence of instructors' conduct on English proficiency abilities has yet to be explored. Teacher competence is a key component in achieving educational goals. The importance of students, textbooks, and teachers is critical for growth and improvement; another essential aspect is teacher conduct. According to educational data and official reports, children in government schools are mistreated and their teachers do not support or respect them. The teacher's conduct has a direct or indirect impact on pupils' performance, either favourably or negatively. It establishes a link between positive teacher conduct and student language and academic progress.

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Keywords: English Teacher, Teachers’ Behaviour, English Proficiency.