1. The Needed Virus How to Spread 21 st Century Teaching for 21 st Century Students Porter Palmer Discovery Education Today ’s Today ’s

2. Learning.com's Sky digital learning environment is specifically designed for K-12 teachers and administrators to provide intuitive tools and improve student learning. Discovery Education content is now available through Sky's single sign-on. Visit Learning.com/DiscoveryEducation to find out how single sign-on can benefit your classroom and incorporate 21st century skills into your teaching!

3. A virus is a small infectious agent that can replicate only inside the living cells of organisms.

16. Diigo http://www.diigo.com/user/discoveryed

17. Delicious http://delicious.com/discoveryea

21. http://educationalwikis.wikispaces.com/Classroom+Wikis

22. What are you reading?

23. http://www.commoncraft.com/rss_plain_english

32. http://www.twitter.com/discoveryed

38. http://www.facebook.com/discoveryed

55. http://edtechtalk.com/

56. http://live.classroom20.com/

58. http://dencommunity.com http://denblogs.com

60. “ Setting an example is not the main means of influencing another, it is the only means.”

61. Learning.com's Sky digital learning environment is specifically designed for K-12 teachers and administrators to provide intuitive tools and improve student learning. Discovery Education content is now available through Sky's single sign-on. Visit Learning.com/DiscoveryEducation to find out how single sign-on can benefit your classroom and incorporate 21st century skills into your teaching!