Chemistry is the study of matter at the macromolecular scale.
Chemistry is concerned with not only the composition of matter but the interaction between them.
Here is a selection of some recommended sites.
AllAtoms.com - A very good resource for Chemistry teachers and students. Contains detailed course outlines, student projects, and has an interactive molecule gallery.
ACS.org - American Chemical Society Site: Contains information about the ACS publications, meetings, policies, funding and awards, membership, careers, and the latest news and research in Chemistry.
Please feel free to share your favorite Chemistry websites along (with a short description).