- System Earth – The Basics (english language version). Introductionary unit for a set of Earth science teaching materials aiming at German chemistry, biology, geography and physics classes (students age: 15 – 18). It includes explanations for teachers (Download pdf). The entire set was written by a group of teachers, science educators, geography educators as well as geoscientists and funded by the German Federal Minsitry of Education and Research (BMBF). A total of 11 modules are available in German language under http://archiv.ipn.uni-kiel.de/System_Erde/materialien_Sek2_2.html).