Learning a second language is nowadays a necessity. It enables people from different mother tongues to establish a common ground for communicating. Particularly, for teenager students whose first language is Spanish, it has been a recurrent difficulty to articulate an understandable and purposefully oral speech in English as a lingua franca. Therefore, it was necessary to analyse the nature of the factors that hinder Telesecundaria students speaking skill development through a descriptive case study. 19 second grade students were surveyed, interviewed and observed to describe their opinions about the influence it had the socio-affective elements present in classroom learning environment where speaking activities are performed. Results revealed that a supporting learning environment enhanced students speaking skill development. Such environment required teachers to provide communicative activities and authentic teaching materials through which students can practice controlled speech. Such kind of discourse allowed students to experience low anxiety levels. Furthermore, a classroom environment that promotes trust and support will allow students to feel confident to speak in public in English. In conclusion, a supportive learning environment characterized by controlled speaking tasks that employs real-life material will allow Telesecundaria students to develop their speaking skills.