The MEL project has developed a set of teaching resources to support the teaching of controversial and/or complex Earth and space science topics. Previously developed MEL teaching resources include those for climate change, earthquakes and fracking, wetlands use, and the formation of the moon. Current baMEL resources are under development for extreme weather, fossils and Earth's past, freshwater availability, and origins of the universe. All materials are freely available under a Creative Commons Attribution-NonCommercial-ShareAlike license . You may reuse these materials for non-commercial purposes as long as you provide attribution and offer any derivative works under a similar license. Credit the Science Learning Research Group, Temple University, for the development of these materials.