A Blue School offers a healthy learning environment and exposes students to environmentally-friendly technologies and practices that can be replicated in their communities. It inspires students to be change agents in their communities and builds the next generation of WASH and environment sector champions.The Catalogue of Practical Exercises aims to inspire teachers with hand-on and low cost exercises to complement the lessons from the national curriculum. The examples provided facilitate students' learning by doing and can be replicated in the students' home and in their communities.It provides examples of practical exercises for each topic of the Blue Schools Kit:1. My Surrounding Environment2. The Water Cycle3. The Watershed around My School4. My Drinking Water5. Sanitation and Hygiene6. Growth and Change7. From Soil to Food8. From Waste to Resources.For each topic, technical background sections are provided to facilitate understanding of basic key concepts. Each topic includes a selection of teaching, participatory or creative activities, discussions, demonstrations, games, and experiments, all requiring simple material at little to no cost. The practical exercises aim to help reaching the key learning objectives defined in each topic's first page. The level of difficulty for each exercise is indicated; depending on the class and age group, teachers can select the most appropriate activities and students can deepen their knowledge on these topics from year to year.This catalogue is a compilation of references from the WASH in School (WINS) community of practice as well as other sectors related to the Blue Schools' topics. It can evolve: Future editions of this Catalogue will benefit from inputs and feedback from users and experts from around the world. Feedback form available on the Swiss Water and Sanitation Consortium website: http://waterconsortium.ch/blueschool/Users of this document are also encouraged to refer to the other materials of the Blue Schools Kit i.e. the Concept Brief, the Facilitator's Guide and the Catalogue of Technologies. These can be downloaded on the Swiss Water and Sanitation website.