Diigo

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 * 7 Reasons You Should Use Diigo**

https://docs.google.com/document/d/1OLCxR6N7mmLA_3d2CnbbcnV-TSAmpNdmu9DLjWsUY_E/edit
 * Social Bookmarking with Diigo**

http://diigo.com/education
 * Diigo for Education**

Since GCISD email accounts do not end in .edu, you will need to use this format: your_diigo_username@diigo.edu

https://sites.google.com/site/team8project9440/using-diigo-in-the-classroom-2
 * Using Diigo in the Classroom**

http://lorenzocaum.com/blog/the-diigo-diigolet-for-the-ipad/
 * Adding the Diigolet to Safari App on iPad**