July 2011 Week 1 Post Summary July 3, 2011 GB Blogs A. Mathematics and Multimedia GeoGebra Sneak Peek 5: The Computer Algebra System How to add a ‘Like us on Facebook’ box on your blog Addition of Coordinates Cleverbot and other talking computers More examples of proof by contradiction Geometer’s Sketchpad Essentials Series B. GeoGebra Applet Central The Excess (or Missing) Area Linear approximation of function What is a square? C. School of Freebies Amazon Cloud Drive: Another online storage Leave a comment blog post summary