This study investigated the interrelationship between students' foreign language anxiety, perceptions of teachers' classroom behaviour and their achievement in English as a Foreign Language (EFL). The participants were eight teachers and their Year 10 and 11 students (N=344) from two different schools, International Standard School (ISS) and non-International Standard School (Non-ISS). The students completed the Foreign Language Classroom Anxiety Scale (FLCAS) by Horwitz et al. (1986) and Student-reported Teacher Style Scale (TSS) by Watt and Richardson (see Spearman, and Watt, 2013); teacher completed Teacher Style Scale (TSS). The result indicated that students who perceived their teacher positively exhibited low anxiety and showed better achievement. Teachers perceived themselves to be more structured, have better relatedness and clearer expectations than their students perceived.