This document provides a step-by-step guide for implementing a Project Based Learning (PBL) program. It describes the context of a secondary school in Buenos Aires, Argentina that moved from using coursebooks to a PBL model. Key steps included curriculum design, project planning, rubrics for assessment of process and products, addressing potential barriers, and ongoing improvement. Benefits included teachers enjoying more creative work, students being more engaged when topics interested them, and the ability to adjust materials annually to evolving needs.