"Global Challenges/Chemistry Solutions (GC/CS) is an ambitious project, launched by ACS in 2008, to identify the world's most pressing sustainability challenges, and explore the solutions emerging from chemistry.
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Updated constantly, this website and podcast, available on iTunes, monitors scientific developments and breakthroughs in the global struggle for sustainability. GC/CS is an ongoing saga of chemistry for life - chemistry that truly matters."
you'll find teaching tools, interactives, podcasts, and hands-on activities, and all of it is free! Science Netlinks provides a wide variety of science lesson plans and other materials that teachers can use with their students in class.