This internship report described in detail my teaching experience carried out in the Bilingualism for Peace program at Aguas Negras School with students from the Beginner level. The purpose of this internship was to put into practice the different techniques, strategies and practices I have gained during my career, and to help students to improve their English skills while providing them a great atmosphere inside the classroom. The lessons were primarily planned focusing on the Project-Based Learning approach along with the implementation of essentials 21st century skills for learners. This document discusses the teaching approaches, methodologies, gains, conclusions, recommendations, and some limitations I faced during this experience where I was growing as a professional and human being.