As a high school math teacher and former math tutoring center owner, I encountered all associated with students in my math classes. Some seemed to breeze through the lessons with very no work or instruction. Some struggled with the teachings but then appeared to master the material and sailed on without a problem. Still others, a large majority of my classes, appeared to have a "mental block&
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Pligg is an open source content management system that lets you easily create your own user-powered website.

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