The Chemical Education Digital Library is a large collection of resources for teaching and learning chemistry. It contains tutorials for students, 3D models, lesson plans, and more. The tutorials include 3D chemical models and explanations of what each part of the models does and how those parts work together. In the lesson plans section you will find downloadable lesson plans organized by subject. ChemEd DL also features a periodic table that links each element to data and explanations about that element.