Advanced materials and methodology to develop teenage students' knowledge about the national nature parks in Lithuania, Latvia and Denmark. The aim of the project is - to establish educational, cultural, development partnership among students and pedagogical staff of participating schools; to promote innovative products, exchange of good practice in the field of environment education; to promote mutual Nordic-Baltic cultural understanding;to discuss how to preserve beauty of nature in national nature parks, appreciate its importance in human life and history; to develop, share relevant materials of environment education within the context of regional nature and culture heritage. During the project, games aimed at development of teenagers' environment research skills are made, field trip routes formed, a collection of forest fairy tales compiled, , 'green' lessons in the national nature parks held, and an authentic e-book "ABC of Nature" created.