This document provides a template for designing a CLIL didactic unit for a physical education class on swimming. The unit aims to teach 2nd year high school students about the main swimming strokes, improve cardiovascular endurance, and understand the health benefits of swimming. Key elements of the unit include learning objectives, subject content on swimming rules and strokes, language content on relevant vocabulary, contextual elements on swimming culture, cognitive processes, tasks like a wiki project and peer assessment, activities using apps and videos, methodology on class organization and timing in the swimming pool, resources, competencies addressed, and evaluation criteria.