The GeoGebra 4.0 Essentials Series and other updates

Hi all. Please take note of the following updates and announcements.

All the tutorials in the GeoGebra Essentials Series are now updated to GeoGebra 4.0. I am working on the other tutorials as well.
For those who want to add me up in Google+, please see the side bar or use mathandmultimedia@gmail.com . You may also want to add me up on on Linkedin.
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Happy holidays!