News Corp rebranded its educational unit as Amplify in July. Since then the Joel Klein-headed company has been working with AT&T to develop a tablet expressly designed for the K-12 educational market. After months of testing the Amplify Tablet, an unspecified 10-inch Android slate loaded with custom software, is ready for its official debut. Lots of things have changed since we first caught a glimpse of the project many months ago. For one, the UI has been completely redesigned to be clean, modern and s