Greener Education Materials for Chemists (GEMs) is an interactive collection of chemistry education materials focused on the rapidly growing field of Green Chemistry. The term refers to the design of chemical products and processes that reduce or eliminate the use and generation of hazardous substances. Often referred to as a form of molecular- level pollution prevention, Green Chemistry relies on a set of 12 principles that can be used to design or re-design molecules, materials and chemical transformations to be safer for human health and the environment. The incorporation of green chemistry principles into the curriculum has fueled a fundamentally new approach to the teaching of chemistry and the GEMs database has been designed to be a rich and efficient resource for green chemistry education materials.  The site is sponsored by the University of Oregon’s chemistry department, which has been a center for green chemistry research.