We live in a digital age where all information are available to everyone. We are only one or two clicks away from insight into the areas we are interested in, but is the educational system in the Republic of Croatia keeping up with it and its challenges? In addition, we live in a time where, globally, environmental awareness and awareness of the importance of sustainable development for our quality of life and our future are increasingly present. The questions that arise through this work are: are these two components that characterize our period connected, that is, is their connection visible through the official website, and does the inclusion of kindergartens and primary schools in the Eco-School program contribute to this? The research analyzed the websites of 174 primary schools and 98 kindergartens with the active status of Eco-schools. By applying the model of integration of sustainability in education to three categories: accommodation, reformation and transformation (Sterling, 2004), which with its gradation points to the importance of structural changes, all websites of institutions were analyzed. The results indicate a small number of institutions that belong to the category of transformation in terms of content, while a surprising number of institutions that belong to the category of accommodation and that there is a greater number of primary schools that have the status of Eco-schools than the number of preschool institutions. As for the division into Northern, Pannonian and Adriatic Croatia, the results indicate the lowest representation in Pannonian Croatia, while Northern Croatia has almost the same percentage as Adriatic Croatia, but only in Northern Croatia is there almost the same percentage of inclusion in both levels of education.