Our friend Howard Rheingold uses Twitter, search, Diigo Delicious, DEVONthink, Scrivener to find, refine, organize information -->knowledge via Screenr!  

Watch video at link below: 


The Khan Academy is amazing! At the Berkeley Home School Prep Academy, we
welcome better intelligence for custom self-paced learning tools. 

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Technology has changed a great deal in the last 5-6 years.  Although, realistically, you would not use all of the technologies stated in this article, but you should be knowledgeable in what each of the following technology is and how it could be/might be used in a classroom.
+Mashable's take on tech startups and education. Tech startups have a ripe opportunity to tap into the education space. Here's how.