This research project was applied at Escuela Tecnologica-Instituto Tecnico Central, a secondary public school in Bogota. The purpose was to promote the oral production through Blended Learning with tenth graders. Additionally, it was carried out through Mixed Method and under Action Research methodology. Concerning data collection were used: diagnostic tests, videos, transcriptions, survey and observation formats in face-to-face and online scenarios. For developing the process of Data Analysis, the teacher-researchers considered “Sequential Exploratory” design. Inside the findings, it was possible to confirm that a B-Learning Proposal can foster oral production, through the implementation of three Lesson Plans based on TBL theory. The students could increase the number of words produced in their oral presentations, what represents the improvement of the fluency; their performance was better in front of online than face-to-face (F2F) tasks.