Did you know that social networking got its start in 1997? Today, the top 23 social media sites each have more than 50 million users. Learn more about this popular technology in Social Networking, part of the 21st Century Technology series. This series takes young learners through the science behind some of the world's most exciting technological innovations. 21st Century Technology is a Series of AV2 media enhanced books. Each title in the series features easy-to-read text, stunning visuals, and a challenging educational activity. A unique book code printed on page 2 unlocks multimedia content. These books come alive with video, audio, weblinks, slide shows, activities, hands-on experiments, and much more. Follow these steps to access your AV2 book.

Step 1 Find the code on page 2 of this book. Step 2 Enter the code at www.av2books.com. Step 3 Explore the AV2 media enhanced book. Book jacket.