I would echo what Betty said about bins. I purchased several rubbermaid bins to store my curricular materials/supplies by activities and concepts. That way, I could find everything I needed in one place from year to year. Later I went to see through bins. Even with labels on the opaque bins, it is nicer to see what is in something without having to pull it from a shelf or open it up. Don't forget a classroom set of safety goggles and a method to keep them sanitizes/clean. There are times even in elementary classrooms where it makes sense to have students don safety glasses. Does your classroom have a sink? That, too, is so helpful. I eventually was able to add a dorm size frig and microwave and/or hot plate for various investigations.There are many generic types of equipment that are useful to have available in your classroom as well: classroom sets of rulers, meter sticks, hand lenses, scissors, beakers, funnels, stop watches, glue/glue sticks, tape, beakers, and flasks. Finally, do you have a place to store your renewable materials like salt, vinegar, borax, baking soda, straws, etc? Flinn has great ideas for storage of all chemicals for elementary classrooms at its website. What are others' ideas?