Biodiversity education, as part of a broader environmental education is an important topic, not only for politicians, journalists but also teachers. In the educational context, it is now recognized that students have to be taught biodiversity, its conservation and how to use it in a durable. In this paper, we are interested in assessing how biodiversity, as part of environmental education, is understood and presented in compulsory education textbooks in the French-speaking part of Switzerland. We performed a lexicographic analysis on IRaMuTeQ on the programs of natural science and of humanities and social sciences on all levels of education in compulsory education in the French-speaking part of Switzerland. Results show that biodiversity is at the heart of the program. Moreover, the program promotes a scientific approach but also emphasizes the importance of interdisciplinarity by including terms from geography, history, etc.: the environment is widely mentioned, and the impact of human behavior is addressed, notably regarding resource and energy consumption. This analysis shows that the program adopts a holistic vision of the concept of the living, integrating scientific as well as environmental aspects.