Use of the SciLinks website is absolutely free of charge. The key to SciLinks is in the margin of your textbook: the SciLinks icon with a special number printed below it—for instance, MIX32. That number, together with the SciLinks Web address (www.SciLinks.org), is all you need to access SciLinks and find Internet resources keyed to the topic discussed at the spot in your textbook where that particular SciLinks number appears.

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It’s really that easy. You don’t have to search the Web—we did it for you! We picked the best resources so you don’t waste your time wading through long lists of hits and weeding out the irrelevant or unhelpful ones. And our database of good science resources on the Internet is constantly being updated by our team of teacher-webwatchers.