The American Chemical Society (ACS) is one of those giant scientific associations that supports the future of STEM in the U.S. With over 160,000 members, 44 journals, and almost 2,000 employees, ACS does everything from bringing great minds together at national and regional conferences to independently funding initiatives. The web site is a hot pot of chemistry resources. Start by checking out the Cool Science articles, which link to interesting insights drawn from chemistry research. Then take the Chemistry Quiz, and have a look a the Molecule of the Week. The Emerging Science section links to open source archives dating back several years, as well as the ACS Green Chemistry Institute, which examines "innovation for a sustainable future."