This document outlines the steps in planning a CLIL (Content and Language Integrated Learning) unit on world population for a 2nd year ESO (compulsory secondary education) social science class. It discusses choosing the driving question, previewing unit content and vocabulary, identifying the easiest and hardest sections, connecting to LOMCE competencies, integrating other subjects like mathematics, and including soft skills like teamwork, communication, and problem solving. The goal is for students to understand main concepts, analyze population pyramids, and address whether Earth's population limit will be reached by working on an important real-world topic.