One of my concerns has been how children behave in a crowded classroom with few available opportunities to interact and rehearse the lesson with their peers and teacher. This research paper allows me to explore how teacher`s directives/ manners  (verbal & non-verbal communication) during the English lesson,  impact and fix children`s behaviours temporarily.  I have conducted this emprirical case study in a religious catholic, monolingual, Spanish school conformed only by girls aged 7-9, who are in the third level of its primary level.  As my interest was to analyze the talk of my purpose sampling (teacher-student) and the interactive behaviour in the natural occurring situation in this social setting, the method I chose was the analysis of social interaction, on Conversation Analysis. This allows me to unfold the talk-in-interaction and concentrate on micro-analytic situations using the standard convention to transcribe my selected analysis. Therefore, the contribution of this paper is to explore and demonstrate how disciplinary acts were deilvered by the teacher affecting the child`s subjectivity and performance in a crowded classroom.